Package 'celda'

Title: CEllular Latent Dirichlet Allocation
Description: Celda is a suite of Bayesian hierarchical models for clustering single-cell RNA-sequencing (scRNA-seq) data. It is able to perform "bi-clustering" and simultaneously cluster genes into gene modules and cells into cell subpopulations. It also contains DecontX, a novel Bayesian method to computationally estimate and remove RNA contamination in individual cells without empty droplet information. A variety of scRNA-seq data visualization functions is also included.
Authors: Joshua Campbell [aut, cre], Shiyi Yang [aut], Zhe Wang [aut], Sean Corbett [aut], Yusuke Koga [aut]
Maintainer: Joshua Campbell <[email protected]>
License: MIT + file LICENSE
Version: 1.23.0
Built: 2024-10-30 04:41:56 UTC
Source: https://github.com/bioc/celda

Help Index

Append two celdaList objects

Description

Returns a single celdaList representing the combination of two provided celdaList objects.

Usage

appendCeldaList(list1, list2)

Arguments

list1

A celda_list object
list2

A celda_list object to be joined with list_1

Value

A celdaList object. This object contains all resList entries and runParam records from both lists.

Examples

data(celdaCGGridSearchRes)
appendedList <- appendCeldaList(
  celdaCGGridSearchRes,
  celdaCGGridSearchRes
)

available models

Description

available models

Usage

availableModels

Format

An object of class character of length 3.

Get the log-likelihood

Description

Retrieves the final log-likelihood from all iterations of Gibbs sampling used to generate a celdaModel.

Usage

bestLogLikelihood(x, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
bestLogLikelihood(x, altExpName = "featureSubset")

## S4 method for signature 'celdaModel'
bestLogLikelihood(x)

Arguments

x

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG, or a celda model object.
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

Numeric. The log-likelihood at the final step of Gibbs sampling used to generate the model.

Examples

data(sceCeldaCG)
bestLogLikelihood(sceCeldaCG)
data(celdaCGMod)
bestLogLikelihood(celdaCGMod)

Celda models

Description

List of available Celda models with correpsonding descriptions.

Usage

celda()

Value

None

Examples

celda()

Cell clustering with Celda

Description

Clusters the columns of a count matrix containing single-cell data into K subpopulations. The useAssay assay slot in altExpName altExp slot will be used if it exists. Otherwise, the useAssay assay slot in x will be used if x is a SingleCellExperiment object.

Usage

celda_C(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  K,
  alpha = 1,
  beta = 1,
  algorithm = c("EM", "Gibbs"),
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  zInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  zInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'SingleCellExperiment'
celda_C(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  K,
  alpha = 1,
  beta = 1,
  algorithm = c("EM", "Gibbs"),
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  zInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  zInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'ANY'
celda_C(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  K,
  alpha = 1,
  beta = 1,
  algorithm = c("EM", "Gibbs"),
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  zInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  zInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

Arguments

x

A SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells. Alternatively, any matrix-like object that can be coerced to a sparse matrix of class "dgCMatrix" can be directly used as input. The matrix will automatically be converted to a SingleCellExperiment object.
useAssay

A string specifying the name of the assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
sampleLabel

Vector or factor. Denotes the sample label for each cell (column) in the count matrix.
K

Integer. Number of cell populations.
alpha

Numeric. Concentration parameter for Theta. Adds a pseudocount to each cell population in each sample. Default 1.
beta

Numeric. Concentration parameter for Phi. Adds a pseudocount to each feature in each cell population. Default 1.
algorithm

String. Algorithm to use for clustering cell subpopulations. One of 'EM' or 'Gibbs'. The EM algorithm is faster, especially for larger numbers of cells. However, more chains may be required to ensure a good solution is found. If 'EM' is selected, then 'stopIter' will be automatically set to 1. Default 'EM'.
stopIter

Integer. Number of iterations without improvement in the log likelihood to stop inference. Default 10.
maxIter

Integer. Maximum number of iterations of Gibbs sampling or EM to perform. Default 200.
splitOnIter

Integer. On every 'splitOnIter' iteration, a heuristic will be applied to determine if a cell population should be reassigned and another cell population should be split into two clusters. To disable splitting, set to -1. Default 10.
splitOnLast

Integer. After 'stopIter' iterations have been performed without improvement, a heuristic will be applied to determine if a cell population should be reassigned and another cell population should be split into two clusters. If a split occurs, then 'stopIter' will be reset. Default TRUE.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.
nchains

Integer. Number of random cluster initializations. Default 3.
zInitialize

Character. One of 'random', 'split', or 'predefined'. With 'random', cells are randomly assigned to a populations. With 'split', cells will be split into sqrt(K) populations and then each population will be subsequently split into another sqrt(K) populations. With 'predefined', values in ‘zInit' will be used to initialize 'z'. Default ’split'.
countChecksum

Character. An MD5 checksum for the 'counts' matrix. Default NULL.
zInit

Integer vector. Sets initial starting values of z. 'zInit' is only used when ‘zInitialize = ’predfined''. Default NULL.
logfile

Character. Messages will be redirected to a file named 'logfile'. If NULL, messages will be printed to stdout. Default NULL.
verbose

Logical. Whether to print log messages. Default TRUE.

Value

A SingleCellExperiment object. Function parameter settings are stored in the metadata "celda_parameters" slot. Columns celda_sample_label and celda_cell_cluster in colData contain sample labels and celda cell population clusters.

See Also

celda_G for feature clustering and celda_CG for simultaneous clustering of features and cells. celdaGridSearch can be used to run multiple values of K and multiple chains in parallel.

Examples

data(celdaCSim)
sce <- celda_C(celdaCSim$counts,
    K = celdaCSim$K,
    sampleLabel = celdaCSim$sampleLabel,
    nchains = 1)

Cell and feature clustering with Celda

Description

Clusters the rows and columns of a count matrix containing single-cell data into L modules and K subpopulations, respectively. The useAssay assay slot in altExpName altExp slot will be used if it exists. Otherwise, the useAssay assay slot in x will be used if x is a SingleCellExperiment object.

Usage

celda_CG(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  K,
  L,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  algorithm = c("EM", "Gibbs"),
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  zInitialize = c("split", "random", "predefined"),
  yInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  zInit = NULL,
  yInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'SingleCellExperiment'
celda_CG(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  K,
  L,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  algorithm = c("EM", "Gibbs"),
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  zInitialize = c("split", "random", "predefined"),
  yInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  zInit = NULL,
  yInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'ANY'
celda_CG(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  K,
  L,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  algorithm = c("EM", "Gibbs"),
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  zInitialize = c("split", "random", "predefined"),
  yInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  zInit = NULL,
  yInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

Arguments

x

A SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells. Alternatively, any matrix-like object that can be coerced to a sparse matrix of class "dgCMatrix" can be directly used as input. The matrix will automatically be converted to a SingleCellExperiment object.
useAssay

A string specifying the name of the assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
sampleLabel

Vector or factor. Denotes the sample label for each cell (column) in the count matrix.
K

Integer. Number of cell populations.
L

Integer. Number of feature modules.
alpha

Numeric. Concentration parameter for Theta. Adds a pseudocount to each cell population in each sample. Default 1.
beta

Numeric. Concentration parameter for Phi. Adds a pseudocount to each feature module in each cell population. Default 1.
delta

Numeric. Concentration parameter for Psi. Adds a pseudocount to each feature in each module. Default 1.
gamma

Numeric. Concentration parameter for Eta. Adds a pseudocount to the number of features in each module. Default 1.
algorithm

String. Algorithm to use for clustering cell subpopulations. One of 'EM' or 'Gibbs'. The EM algorithm for cell clustering is faster, especially for larger numbers of cells. However, more chains may be required to ensure a good solution is found. Default 'EM'.
stopIter

Integer. Number of iterations without improvement in the log likelihood to stop inference. Default 10.
maxIter

Integer. Maximum number of iterations of Gibbs sampling to perform. Default 200.
splitOnIter

Integer. On every splitOnIter iteration, a heuristic will be applied to determine if a cell population or feature module should be reassigned and another cell population or feature module should be split into two clusters. To disable splitting, set to -1. Default 10.
splitOnLast

Integer. After stopIter iterations have been performed without improvement, a heuristic will be applied to determine if a cell population or feature module should be reassigned and another cell population or feature module should be split into two clusters. If a split occurs, then 'stopIter' will be reset. Default TRUE.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.
nchains

Integer. Number of random cluster initializations. Default 3.
zInitialize

Chararacter. One of 'random', 'split', or 'predefined'. With 'random', cells are randomly assigned to a populations. With 'split', cells will be split into sqrt(K) populations and then each population will be subsequently split into another sqrt(K) populations. With 'predefined', values in zInit will be used to initialize z. Default 'split'.
yInitialize

Character. One of 'random', 'split', or 'predefined'. With 'random', features are randomly assigned to a modules. With 'split', features will be split into sqrt(L) modules and then each module will be subsequently split into another sqrt(L) modules. With 'predefined', values in yInit will be used to initialize y. Default 'split'.
countChecksum

Character. An MD5 checksum for the counts matrix. Default NULL.
zInit

Integer vector. Sets initial starting values of z. 'zInit' is only used when ‘zInitialize = ’predfined''. Default NULL.
yInit

Integer vector. Sets initial starting values of y. 'yInit' is only be used when 'yInitialize = "predefined"'. Default NULL.
logfile

Character. Messages will be redirected to a file named 'logfile'. If NULL, messages will be printed to stdout. Default NULL.
verbose

Logical. Whether to print log messages. Default TRUE.

Value

A SingleCellExperiment object. Function parameter settings are stored in metadata "celda_parameters" in altExp slot. In altExp slot, columns celda_sample_label and celda_cell_cluster in colData contain sample labels and celda cell population clusters. Column celda_feature_module in rowData contains feature modules.

See Also

celda_G for feature clustering and celda_C for clustering cells. celdaGridSearch can be used to run multiple values of K/L and multiple chains in parallel.

Examples

data(celdaCGSim)
sce <- celda_CG(celdaCGSim$counts,
    K = celdaCGSim$K,
    L = celdaCGSim$L,
    sampleLabel = celdaCGSim$sampleLabel,
    nchains = 1)

Feature clustering with Celda

Description

Clusters the rows of a count matrix containing single-cell data into L modules. The useAssay assay slot in altExpName altExp slot will be used if it exists. Otherwise, the useAssay assay slot in x will be used if x is a SingleCellExperiment object.

Usage

celda_G(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  L,
  beta = 1,
  delta = 1,
  gamma = 1,
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  yInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  yInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'SingleCellExperiment'
celda_G(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  L,
  beta = 1,
  delta = 1,
  gamma = 1,
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  yInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  yInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'ANY'
celda_G(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  L,
  beta = 1,
  delta = 1,
  gamma = 1,
  stopIter = 10,
  maxIter = 200,
  splitOnIter = 10,
  splitOnLast = TRUE,
  seed = 12345,
  nchains = 3,
  yInitialize = c("split", "random", "predefined"),
  countChecksum = NULL,
  yInit = NULL,
  logfile = NULL,
  verbose = TRUE
)

Arguments

x

A SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells. Alternatively, any matrix-like object that can be coerced to a sparse matrix of class "dgCMatrix" can be directly used as input. The matrix will automatically be converted to a SingleCellExperiment object.
useAssay

A string specifying the name of the assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
L

Integer. Number of feature modules.
beta

Numeric. Concentration parameter for Phi. Adds a pseudocount to each feature module in each cell. Default 1.
delta

Numeric. Concentration parameter for Psi. Adds a pseudocount to each feature in each module. Default 1.
gamma

Numeric. Concentration parameter for Eta. Adds a pseudocount to the number of features in each module. Default 1.
stopIter

Integer. Number of iterations without improvement in the log likelihood to stop inference. Default 10.
maxIter

Integer. Maximum number of iterations of Gibbs sampling to perform. Default 200.
splitOnIter

Integer. On every 'splitOnIter' iteration, a heuristic will be applied to determine if a feature module should be reassigned and another feature module should be split into two clusters. To disable splitting, set to -1. Default 10.
splitOnLast

Integer. After 'stopIter' iterations have been performed without improvement, a heuristic will be applied to determine if a cell population should be reassigned and another cell population should be split into two clusters. If a split occurs, then 'stopIter' will be reset. Default TRUE.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.
nchains

Integer. Number of random cluster initializations. Default 3.
yInitialize

Chararacter. One of 'random', 'split', or 'predefined'. With 'random', features are randomly assigned to a modules. With 'split', features will be split into sqrt(L) modules and then each module will be subsequently split into another sqrt(L) modules. With 'predefined', values in ‘yInit' will be used to initialize 'y'. Default ’split'.
countChecksum

Character. An MD5 checksum for the 'counts' matrix. Default NULL.
yInit

Integer vector. Sets initial starting values of y. ‘yInit' can only be used when 'yInitialize = ’predefined''. Default NULL.
logfile

Character. Messages will be redirected to a file named logfile. If NULL, messages will be printed to stdout. Default NULL.
verbose

Logical. Whether to print log messages. Default TRUE.

Value

A SingleCellExperiment object. Function parameter settings are stored in the metadata "celda_parameters" slot. Column celda_feature_module in rowData contains feature modules.

See Also

celda_C for cell clustering and celda_CG for simultaneous clustering of features and cells. celdaGridSearch can be used to run multiple values of L and multiple chains in parallel.

Examples

data(celdaGSim)
sce <- celda_G(celdaGSim$counts, L = celdaGSim$L, nchains = 1)

celdaCGGridSearchRes

Description

Example results of old celdaGridSearch on celdaCGSim

Usage

celdaCGGridSearchRes

Format

An object as returned from old celdaGridSearch()

celdaCGmod

Description

celda_CG model object generated from celdaCGSim using old celda_CG function.

Usage

celdaCGMod

Format

A celda_CG object

celdaCGSim

Description

An deprecated example of simulated count matrix from the celda_CG model.

Usage

celdaCGSim

Format

A list of counts and properties as returned from old simulateCells().

Get or set the cell cluster labels from a celda SingleCellExperiment object or celda model object.

Description

Return or set the cell cluster labels determined by celda_C or celda_CG models.

Usage

celdaClusters(x, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
celdaClusters(x, altExpName = "featureSubset")

## S4 method for signature 'celdaModel'
celdaClusters(x)

celdaClusters(x, altExpName = "featureSubset") <- value

## S4 replacement method for signature 'SingleCellExperiment'
celdaClusters(x, altExpName = "featureSubset") <- value

Arguments

x

Can be one of

  • A SingleCellExperiment object returned by celda_C, or celda_CG, with the matrix located in the useAssay assay slot. The a altExp slot with name altExpName will be used. Rows represent features and columns represent cells.

  • Celda model object.
altExpName

The name for the altExp slot to use. Default "featureSubset".
value

Character vector of cell cluster labels for replacements. Works only if x is a SingleCellExperiment object.

Value

One of

  • Character vector if x is a SingleCellExperiment object. Contains cell cluster labels for each cell in x.

  • List if x is a celda model object. Contains cell cluster labels (for celda_C and celdaCG Models) and/or feature module labels (for celda_G and celdaCG Models).

Examples

data(sceCeldaCG)
celdaClusters(sceCeldaCG)
data(celdaCGMod)
celdaClusters(celdaCGMod)

celdaCMod

Description

Old celda_C results generated from celdaCSim

Usage

celdaCMod

Format

A celda_C object

celdaCSim

Description

An old example simulated count matrix from the celda_C model.

Usage

celdaCSim

Format

A list of counts and properties as returned from old simulateCells().

celdaGMod

Description

Old celda_G results generated from celdaGsim

Usage

celdaGMod

Format

A celda_G object

Run Celda in parallel with multiple parameters

Description

Run Celda with different combinations of parameters and multiple chains in parallel. The variable availableModels contains the potential models that can be utilized. Different parameters to be tested should be stored in a list and passed to the argument paramsTest. Fixed parameters to be used in all models, such as sampleLabel, can be passed as a list to the argument paramsFixed. When verbose = TRUE, output from each chain will be sent to a log file but not be displayed in stdout.

Usage

celdaGridSearch(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  model,
  paramsTest,
  paramsFixed = NULL,
  maxIter = 200,
  nchains = 3,
  cores = 1,
  bestOnly = TRUE,
  seed = 12345,
  perplexity = TRUE,
  verbose = TRUE,
  logfilePrefix = "Celda"
)

## S4 method for signature 'SingleCellExperiment'
celdaGridSearch(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  model,
  paramsTest,
  paramsFixed = NULL,
  maxIter = 200,
  nchains = 3,
  cores = 1,
  bestOnly = TRUE,
  seed = 12345,
  perplexity = TRUE,
  verbose = TRUE,
  logfilePrefix = "Celda"
)

## S4 method for signature 'matrix'
celdaGridSearch(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  model,
  paramsTest,
  paramsFixed = NULL,
  maxIter = 200,
  nchains = 3,
  cores = 1,
  bestOnly = TRUE,
  seed = 12345,
  perplexity = TRUE,
  verbose = TRUE,
  logfilePrefix = "Celda"
)

Arguments

x

A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
useAssay

A string specifying the name of the assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
model

Celda model. Options available in availableModels.
paramsTest

List. A list denoting the combinations of parameters to run in a celda model. For example, list(K = seq(5, 10), L = seq(15, 20)) will run all combinations of K from 5 to 10 and L from 15 to 20 in model celda_CG.
paramsFixed

List. A list denoting additional parameters to use in each celda model. Default NULL.
maxIter

Integer. Maximum number of iterations of sampling to perform. Default 200.
nchains

Integer. Number of random cluster initializations. Default 3.
cores

Integer. The number of cores to use for parallel estimation of chains. Default 1.
bestOnly

Logical. Whether to return only the chain with the highest log likelihood per combination of parameters or return all chains. Default TRUE.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. Seed values seq(seed, (seed + nchains - 1)) will be supplied to each chain in nchains. If NULL, no calls to with_seed are made.
perplexity

Logical. Whether to calculate perplexity for each model. If FALSE, then perplexity can be calculated later with resamplePerplexity. Default TRUE.
verbose

Logical. Whether to print log messages during celda chain execution. Default TRUE.
logfilePrefix

Character. Prefix for log files from worker threads and main process. Default "Celda".

Value

A SingleCellExperiment object. Function parameter settings and celda model results are stored in the metadata "celda_grid_search" slot.

See Also

celda_G for feature clustering, celda_C for clustering of cells, and celda_CG for simultaneous clustering of features and cells. subsetCeldaList can subset the celdaList object. selectBestModel can get the best model for each combination of parameters.

Examples

## Not run: 
data(celdaCGSim)
## Run various combinations of parameters with 'celdaGridSearch'
celdaCGGridSearchRes <- celdaGridSearch(celdaCGSim$counts,
  model = "celda_CG",
  paramsTest = list(K = seq(4, 6), L = seq(9, 11)),
  paramsFixed = list(sampleLabel = celdaCGSim$sampleLabel),
  bestOnly = TRUE,
  nchains = 1,
  cores = 1)

## End(Not run)

celdaGSim

Description

An old example simulated count matrix from the celda_G model.

Usage

celdaGSim

Format

A list of counts and properties as returned from old simulateCells()

Plot celda Heatmap

Description

Render a stylable heatmap of count data based on celda clustering results.

Usage

celdaHeatmap(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  featureIx = NULL,
  nfeatures = 25,
  ...
)

## S4 method for signature 'SingleCellExperiment'
celdaHeatmap(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  featureIx = NULL,
  nfeatures = 25,
  ...
)

Arguments

sce

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG.
useAssay

A string specifying which assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
featureIx

Integer vector. Select features for display in heatmap. If NULL, no subsetting will be performed. Default NULL. Only used for sce containing celda_C model result returned by celda_C.
nfeatures

Integer. Maximum number of features to select for each gene module. Default 25. Only used for sce containing celda_CG or celda_G model results returned by celda_CG or celda_G.
...

Additional parameters passed to plotHeatmap.

Value

list A list containing dendrogram information and the heatmap grob

See Also

'celdaTsne()' for generating 2-dimensional tSNE coordinates

Examples

data(sceCeldaCG)
celdaHeatmap(sceCeldaCG)

Get celda model from a celda SingleCellExperiment object

Description

Return the celda model for sce returned by celda_C, celda_G or celda_CG.

Usage

celdaModel(sce, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
celdaModel(sce, altExpName = "featureSubset")

Arguments

sce

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG.
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

Character. The celda model. Can be one of "celda_C", "celda_G", or "celda_CG".

Examples

data(sceCeldaCG)
celdaModel(sceCeldaCG)

Get or set the feature module labels from a celda SingleCellExperiment object.

Description

Return or set the feature module cluster labels determined by celda_G or celda_CG models.

Usage

celdaModules(sce, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
celdaModules(sce, altExpName = "featureSubset")

celdaModules(sce, altExpName = "featureSubset") <- value

## S4 replacement method for signature 'SingleCellExperiment'
celdaModules(sce, altExpName = "featureSubset") <- value

Arguments

sce

A SingleCellExperiment object returned by celda_G, or celda_CG, with the matrix located in the useAssay assay slot. Rows represent features and columns represent cells.
altExpName

The name for the altExp slot to use. Default "featureSubset".
value

Character vector of feature module labels for replacements. Works only if x is a SingleCellExperiment object.

Value

Character vector. Contains feature module labels for each feature in x.

Examples

data(sceCeldaCG)
celdaModules(sceCeldaCG)

Get perplexity for every model in a celdaList

Description

Returns perplexity for each model in a celdaList as calculated by 'perplexity().'

Usage

celdaPerplexity(celdaList)

Arguments

celdaList

An object of class celdaList.

Value

List. Contains one celdaModel object for each of the parameters specified in the 'runParams()' of the provided celda list.

Examples

data(celdaCGGridSearchRes)
celdaCGGridModelPerplexities <- celdaPerplexity(celdaCGGridSearchRes)

Get perplexity for every model in a celdaList

Description

Returns perplexity for each model in a celdaList as calculated by 'perplexity().'

Usage

## S4 method for signature 'celdaList'
celdaPerplexity(celdaList)

Arguments

celdaList

An object of class celdaList.

Value

List. Contains one celdaModel object for each of the parameters specified in the 'runParams()' of the provided celda list.

Examples

data(celdaCGGridSearchRes)
celdaCGGridModelPerplexities <- celdaPerplexity(celdaCGGridSearchRes)

Probability map for a celda model

Description

Renders probability and relative expression heatmaps to visualize the relationship between features and cell populations (or cell populations and samples).

Usage

celdaProbabilityMap(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  level = c("cellPopulation", "sample"),
  ncols = 100,
  col2 = circlize::colorRamp2(c(-2, 0, 2), c("#1E90FF", "#FFFFFF", "#CD2626")),
  title1 = "Absolute probability",
  title2 = "Relative expression",
  showColumnNames = TRUE,
  showRowNames = TRUE,
  rowNamesgp = grid::gpar(fontsize = 8),
  colNamesgp = grid::gpar(fontsize = 12),
  clusterRows = FALSE,
  clusterColumns = FALSE,
  showHeatmapLegend = TRUE,
  heatmapLegendParam = list(title = NULL, legend_height = grid::unit(6, "cm")),
  ...
)

## S4 method for signature 'SingleCellExperiment'
celdaProbabilityMap(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  level = c("cellPopulation", "sample"),
  ncols = 100,
  col2 = circlize::colorRamp2(c(-2, 0, 2), c("#1E90FF", "#FFFFFF", "#CD2626")),
  title1 = "Absolute probability",
  title2 = "Relative expression",
  showColumnNames = TRUE,
  showRowNames = TRUE,
  rowNamesgp = grid::gpar(fontsize = 8),
  colNamesgp = grid::gpar(fontsize = 12),
  clusterRows = FALSE,
  clusterColumns = FALSE,
  showHeatmapLegend = TRUE,
  heatmapLegendParam = list(title = NULL, legend_height = grid::unit(6, "cm")),
  ...
)

Arguments

sce

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG.
useAssay

A string specifying which assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
level

Character. One of "cellPopulation" or "Sample". "cellPopulation" will display the absolute probabilities and relative normalized expression of each module in each cell population. level = "cellPopulation" only works for celda_CG sce objects. "sample" will display the absolute probabilities and relative normalized abundance of each cell population in each sample. Default "cellPopulation".
ncols

The number of colors (>1) to be in the color palette of the absolute probability heatmap.
col2

Passed to col argument of Heatmap. Set color boundaries and colors for the relative expression heatmap.
title1

Passed to column_title argument of Heatmap. Figure title for the absolute probability heatmap.
title2

Passed to column_title argument of Heatmap. Figure title for the relative expression heatmap.
showColumnNames

Passed to show_column_names argument of Heatmap. Show column names.
showRowNames

Passed to show_row_names argument of Heatmap. Show row names.
rowNamesgp

Passed to row_names_gp argument of Heatmap. Set row name font.
colNamesgp

Passed to column_names_gp argument of Heatmap. Set column name font.
clusterRows

Passed to cluster_rows argument of Heatmap. Cluster rows.
clusterColumns

Passed to cluster_columns argument of Heatmap. Cluster columns.
showHeatmapLegend

Passed to show_heatmap_legend argument of Heatmap. Show heatmap legend.
heatmapLegendParam

Passed to heatmap_legend_param argument of Heatmap. Heatmap legend parameters.
...

Additional parameters passed to Heatmap.

Value

A HeatmapList object containing 2 Heatmap-class objects

See Also

celda_C for clustering cells. celda_CG for clustering features and cells

Examples

data(sceCeldaCG)
celdaProbabilityMap(sceCeldaCG)

Convert old celda model object to SCE object

Description

Convert a old celda model object (celda_C, celda_G, or celda_CG object) to a SingleCellExperiment object containing celda model information in metadata slot. Counts matrix is stored in the "counts" assay slot in assays.

Usage

celdatosce(
  celdaModel,
  counts,
  useAssay = "counts",
  altExpName = "featureSubset"
)

## S4 method for signature 'celda_C'
celdatosce(
  celdaModel,
  counts,
  useAssay = "counts",
  altExpName = "featureSubset"
)

## S4 method for signature 'celda_G'
celdatosce(
  celdaModel,
  counts,
  useAssay = "counts",
  altExpName = "featureSubset"
)

## S4 method for signature 'celda_CG'
celdatosce(
  celdaModel,
  counts,
  useAssay = "counts",
  altExpName = "featureSubset"
)

## S4 method for signature 'celdaList'
celdatosce(
  celdaModel,
  counts,
  useAssay = "counts",
  altExpName = "featureSubset"
)

Arguments

celdaModel

A celdaModel or celdaList object generated using older versions of celda.
counts

A numeric matrix of counts used to generate celdaModel. Dimensions and MD5 checksum will be checked by compareCountMatrix.
useAssay

A string specifying the name of the assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

A SingleCellExperiment object. Function parameter settings are stored in the metadata "celda_parameters" slot. Columns celda_sample_label and celda_cell_cluster in colData contain sample labels and celda cell population clusters. Column celda_feature_module in rowData contain feature modules.

Examples

data(celdaCMod, celdaCSim)
sce <- celdatosce(celdaCMod, celdaCSim$counts)
data(celdaGMod, celdaGSim)
sce <- celdatosce(celdaGMod, celdaGSim$counts)
data(celdaCGMod, celdaCGSim)
sce <- celdatosce(celdaCGMod, celdaCGSim$counts)
data(celdaCGGridSearchRes, celdaCGSim)
sce <- celdatosce(celdaCGGridSearchRes, celdaCGSim$counts)

t-Distributed Stochastic Neighbor Embedding (t-SNE) dimension reduction for celda sce object

Description

Embeds cells in two dimensions using Rtsne based on a celda model. For celda_C sce objects, PCA on the normalized counts is used to reduce the number of features before applying t-SNE. For celda_CG and celda_G sce objects, tSNE is run on module probabilities to reduce the number of features instead of using PCA. Module probabilities are square-root transformed before applying tSNE.

Usage

celdaTsne(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  maxCells = NULL,
  minClusterSize = 100,
  initialDims = 20,
  modules = NULL,
  perplexity = 20,
  maxIter = 2500,
  normalize = "proportion",
  scaleFactor = NULL,
  transformationFun = sqrt,
  seed = 12345
)

## S4 method for signature 'SingleCellExperiment'
celdaTsne(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  maxCells = NULL,
  minClusterSize = 100,
  initialDims = 20,
  modules = NULL,
  perplexity = 20,
  maxIter = 2500,
  normalize = "proportion",
  scaleFactor = NULL,
  transformationFun = sqrt,
  seed = 12345
)

Arguments

sce

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG.
useAssay

A string specifying which assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
maxCells

Integer. Maximum number of cells to plot. Cells will be randomly subsampled if ncol(counts) > maxCells. Larger numbers of cells requires more memory. If NULL, no subsampling will be performed. Default NULL.
minClusterSize

Integer. Do not subsample cell clusters below this threshold. Default 100.
initialDims

Integer. PCA will be used to reduce the dimensionality of the dataset. The top 'initialDims' principal components will be used for tSNE. Default 20.
modules

Integer vector. Determines which feature modules to use for tSNE. If NULL, all modules will be used. Default NULL.
perplexity

Numeric. Perplexity parameter for tSNE. Default 20.
maxIter

Integer. Maximum number of iterations in tSNE generation. Default 2500.
normalize

Character. Passed to normalizeCounts in normalization step. Divides counts by the library sizes for each cell. One of 'proportion', 'cpm', 'median', or 'mean'. 'proportion' uses the total counts for each cell as the library size. 'cpm' divides the library size of each cell by one million to produce counts per million. 'median' divides the library size of each cell by the median library size across all cells. 'mean' divides the library size of each cell by the mean library size across all cells.
scaleFactor

Numeric. Sets the scale factor for cell-level normalization. This scale factor is multiplied to each cell after the library size of each cell had been adjusted in normalize. Default NULL which means no scale factor is applied.
transformationFun

Function. Applys a transformation such as 'sqrt', 'log', 'log2', 'log10', or 'log1p'. If NULL, no transformation will be applied. Occurs after applying normalization and scale factor. Default NULL.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.

Value

sce with t-SNE coordinates (columns "celda_tSNE1" & "celda_tSNE2") added to reducedDim(sce, "celda_tSNE").

Examples

data(sceCeldaCG)
tsneRes <- celdaTsne(sceCeldaCG)

Uniform Manifold Approximation and Projection (UMAP) dimension reduction for celda sce object

Description

Embeds cells in two dimensions using umap based on a celda model. For celda_C sce objects, PCA on the normalized counts is used to reduce the number of features before applying UMAP. For celda_CG sce object, UMAP is run on module probabilities to reduce the number of features instead of using PCA. Module probabilities are square-root transformed before applying UMAP.

Usage

celdaUmap(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  maxCells = NULL,
  minClusterSize = 100,
  modules = NULL,
  seed = 12345,
  nNeighbors = 30,
  minDist = 0.75,
  spread = 1,
  pca = TRUE,
  initialDims = 50,
  normalize = "proportion",
  scaleFactor = NULL,
  transformationFun = sqrt,
  cores = 1,
  ...
)

## S4 method for signature 'SingleCellExperiment'
celdaUmap(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  maxCells = NULL,
  minClusterSize = 100,
  modules = NULL,
  seed = 12345,
  nNeighbors = 30,
  minDist = 0.75,
  spread = 1,
  pca = TRUE,
  initialDims = 50,
  normalize = "proportion",
  scaleFactor = NULL,
  transformationFun = sqrt,
  cores = 1,
  ...
)

Arguments

sce

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG.
useAssay

A string specifying which assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
maxCells

Integer. Maximum number of cells to plot. Cells will be randomly subsampled if ncol(sce) > maxCells. Larger numbers of cells requires more memory. If NULL, no subsampling will be performed. Default NULL.
minClusterSize

Integer. Do not subsample cell clusters below this threshold. Default 100.
modules

Integer vector. Determines which features modules to use for UMAP. If NULL, all modules will be used. Default NULL.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.
nNeighbors

The size of local neighborhood used for manifold approximation. Larger values result in more global views of the manifold, while smaller values result in more local data being preserved. Default 30. See umap for more information.
minDist

The effective minimum distance between embedded points. Smaller values will result in a more clustered/clumped embedding where nearby points on the manifold are drawn closer together, while larger values will result on a more even dispersal of points. Default 0.75. See umap for more information.
spread

The effective scale of embedded points. In combination with min_dist, this determines how clustered/clumped the embedded points are. Default 1. See umap for more information.
pca

Logical. Whether to perform dimensionality reduction with PCA before UMAP. Only works for celda_C sce objects.
initialDims

Integer. Number of dimensions from PCA to use as input in UMAP. Default 50. Only works for celda_C sce objects.
normalize

Character. Passed to normalizeCounts in normalization step. Divides counts by the library sizes for each cell. One of 'proportion', 'cpm', 'median', or 'mean'. 'proportion' uses the total counts for each cell as the library size. 'cpm' divides the library size of each cell by one million to produce counts per million. 'median' divides the library size of each cell by the median library size across all cells. 'mean' divides the library size of each cell by the mean library size across all cells.
scaleFactor

Numeric. Sets the scale factor for cell-level normalization. This scale factor is multiplied to each cell after the library size of each cell had been adjusted in normalize. Default NULL which means no scale factor is applied.
transformationFun

Function. Applys a transformation such as 'sqrt', 'log', 'log2', 'log10', or 'log1p'. If NULL, no transformation will be applied. Occurs after applying normalization and scale factor. Default NULL.
cores

Number of threads to use. Default 1.
...

Additional parameters to pass to umap.

Value

sce with UMAP coordinates (columns "celda_UMAP1" & "celda_UMAP2") added to reducedDim(sce, "celda_UMAP").

Examples

data(sceCeldaCG)
umapRes <- celdaUmap(sceCeldaCG)

Get the conditional probabilities of cell in subpopulations from celda model

Description

Calculate the conditional probability of each cell belonging to each subpopulation given all other cell cluster assignments and/or each feature belonging to each module given all other feature cluster assignments in a celda model.

Usage

clusterProbability(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  log = FALSE
)

## S4 method for signature 'SingleCellExperiment'
clusterProbability(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  log = FALSE
)

Arguments

sce

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG, with the matrix located in the useAssay assay slot. Rows represent features and columns represent cells.
useAssay

A string specifying which assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
log

Logical. If FALSE, then the normalized conditional probabilities will be returned. If TRUE, then the unnormalized log probabilities will be returned. Default FALSE.

Value

A list containging a matrix for the conditional cell subpopulation cluster and/or feature module probabilities.

See Also

'celda_C()' for clustering cells

Examples

data(sceCeldaCG)
clusterProb <- clusterProbability(sceCeldaCG, log = TRUE)
data(sceCeldaC)
clusterProb <- clusterProbability(sceCeldaC)

Check count matrix consistency

Description

Checks if the counts matrix is the same one used to generate the celda model object by comparing dimensions and MD5 checksum.

Usage

compareCountMatrix(counts, celdaMod, errorOnMismatch = TRUE)

## S4 method for signature 'ANY,celdaModel'
compareCountMatrix(counts, celdaMod, errorOnMismatch = TRUE)

## S4 method for signature 'ANY,celdaList'
compareCountMatrix(counts, celdaMod, errorOnMismatch = TRUE)

Arguments

counts

Integer , Numeric, or Sparse matrix. Rows represent features and columns represent cells.
celdaMod

A celdaModel or celdaList object.
errorOnMismatch

Logical. Whether to throw an error in the event of a mismatch. Default TRUE.

Value

Returns TRUE if provided count matrix matches the one used in the celda object and/or errorOnMismatch = FALSE, FALSE otherwise.

Examples

data(celdaCGSim, celdaCGMod)
compareCountMatrix(celdaCGSim$counts, celdaCGMod, errorOnMismatch = FALSE)
data(celdaCGSim, celdaCGGridSearchRes)
compareCountMatrix(celdaCGSim$counts, celdaCGGridSearchRes,
    errorOnMismatch = FALSE)

contaminationSim

Description

A toy contamination data generated by simulateContamination

Usage

contaminationSim

Format

A list

Get the MD5 hash of the count matrix from the celdaList

Description

Returns the MD5 hash of the count matrix used to generate the celdaList.

Usage

countChecksum(celdaList)

Arguments

celdaList

An object of class celdaList.

Value

A character string of length 32 containing the MD5 digest of the count matrix.

Examples

data(celdaCGGridSearchRes)
countChecksum <- countChecksum(celdaCGGridSearchRes)

Get the MD5 hash of the count matrix from the celdaList

Description

Returns the MD5 hash of the count matrix used to generate the celdaList.

Usage

## S4 method for signature 'celdaList'
countChecksum(celdaList)

Arguments

celdaList

An object of class celdaList.

Value

A character string of length 32 containing the MD5 digest of the count matrix.

Examples

data(celdaCGGridSearchRes)
countChecksum <- countChecksum(celdaCGGridSearchRes)

Contamination estimation with decontX

Description

Identifies contamination from factors such as ambient RNA in single cell genomic datasets.

Usage

decontX(x, ...)

## S4 method for signature 'SingleCellExperiment'
decontX(
  x,
  assayName = "counts",
  z = NULL,
  batch = NULL,
  background = NULL,
  bgAssayName = NULL,
  bgBatch = NULL,
  maxIter = 500,
  delta = c(10, 10),
  estimateDelta = TRUE,
  convergence = 0.001,
  iterLogLik = 10,
  varGenes = 5000,
  dbscanEps = 1,
  seed = 12345,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'ANY'
decontX(
  x,
  z = NULL,
  batch = NULL,
  background = NULL,
  bgBatch = NULL,
  maxIter = 500,
  delta = c(10, 10),
  estimateDelta = TRUE,
  convergence = 0.001,
  iterLogLik = 10,
  varGenes = 5000,
  dbscanEps = 1,
  seed = 12345,
  logfile = NULL,
  verbose = TRUE
)

Arguments

x

A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under assayName. Cells in each batch will be subsetted and converted to a sparse matrix of class dgCMatrix from package Matrix before analysis. This object should only contain filtered cells after cell calling. Empty cell barcodes (low expression droplets before cell calling) are not needed to run DecontX.
...

For the generic, further arguments to pass to each method.
assayName

Character. Name of the assay to use if x is a SingleCellExperiment.
z

Numeric or character vector. Cell cluster labels. If NULL, PCA will be used to reduce the dimensionality of the dataset initially, 'umap' from the 'uwot' package will be used to further reduce the dataset to 2 dimenions and the 'dbscan' function from the 'dbscan' package will be used to identify clusters of broad cell types. Default NULL.
batch

Numeric or character vector. Batch labels for cells. If batch labels are supplied, DecontX is run on cells from each batch separately. Cells run in different channels or assays should be considered different batches. Default NULL.
background

A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under assayName. It should have the same data format as x except it contains the empty droplets instead of cells. When supplied, empirical distribution of transcripts from these empty droplets will be used as the contamination distribution. Default NULL.
bgAssayName

Character. Name of the assay to use if background is a SingleCellExperiment. Default to same as assayName.
bgBatch

Numeric or character vector. Batch labels for background. Its unique values should be the same as those in batch, such that each batch of cells have their corresponding batch of empty droplets as background, pointed by this parameter. Default to NULL.
maxIter

Integer. Maximum iterations of the EM algorithm. Default 500.
delta

Numeric Vector of length 2. Concentration parameters for the Dirichlet prior for the contamination in each cell. The first element is the prior for the native counts while the second element is the prior for the contamination counts. These essentially act as pseudocounts for the native and contamination in each cell. If estimateDelta = TRUE, this is only used to produce a random sample of proportions for an initial value of contamination in each cell. Then fit_dirichlet is used to update delta in each iteration. If estimateDelta = FALSE, then delta is fixed with these values for the entire inference procedure. Fixing delta and setting a high number in the second element will force decontX to be more aggressive and estimate higher levels of contamination at the expense of potentially removing native expression. Default c(10, 10).
estimateDelta

Boolean. Whether to update delta at each iteration.
convergence

Numeric. The EM algorithm will be stopped if the maximum difference in the contamination estimates between the previous and current iterations is less than this. Default 0.001.
iterLogLik

Integer. Calculate log likelihood every iterLogLik iteration. Default 10.
varGenes

Integer. The number of variable genes to use in dimensionality reduction before clustering. Variability is calcualted using modelGeneVar function from the 'scran' package. Used only when z is not provided. Default 5000.
dbscanEps

Numeric. The clustering resolution parameter used in 'dbscan' to estimate broad cell clusters. Used only when z is not provided. Default 1.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.
logfile

Character. Messages will be redirected to a file named 'logfile'. If NULL, messages will be printed to stdout. Default NULL.
verbose

Logical. Whether to print log messages. Default TRUE.

Value

If x is a matrix-like object, a list will be returned with the following items:

decontXcounts:

The decontaminated matrix. Values obtained from the variational inference procedure may be non-integer. However, integer counts can be obtained by rounding, e.g. round(decontXcounts).

contamination:

Percentage of contamination in each cell.

estimates:

List of estimated parameters for each batch. If z was not supplied, then the UMAP coordinates used to generated cell cluster labels will also be stored here.

z:

Cell population/cluster labels used for analysis.

runParams:

List of arguments used in the function call.

If x is a SingleCellExperiment, then the decontaminated counts will be stored as an assay and can be accessed with decontXcounts(x). The contamination values and cluster labels will be stored in colData(x). estimates and runParams will be stored in metadata(x)$decontX. The UMAPs used to generated cell cluster labels will be stored in reducedDims slot in x.

Author(s)

Shiyi Yang, Yuan Yin, Joshua Campbell

Examples

# Generate matrix with contamination
s <- simulateContamination(seed = 12345)

library(SingleCellExperiment)
sce <- SingleCellExperiment(list(counts = s$observedCounts))
sce <- decontX(sce)

# Plot contamination on UMAP
plotDecontXContamination(sce)

# Plot decontX cluster labels
umap <- reducedDim(sce)
plotDimReduceCluster(x = sce$decontX_clusters,
    dim1 = umap[, 1], dim2 = umap[, 2], )

# Plot percentage of marker genes detected
# in each cell cluster before decontamination
s$markers
plotDecontXMarkerPercentage(sce, markers = s$markers, assayName = "counts")

# Plot percentage of marker genes detected
# in each cell cluster after contamination
plotDecontXMarkerPercentage(sce, markers = s$markers,
                            assayName = "decontXcounts")

# Plot percentage of marker genes detected in each cell
# comparing original and decontaminated counts side-by-side
plotDecontXMarkerPercentage(sce, markers = s$markers,
                            assayName = c("counts", "decontXcounts"))

# Plot raw counts of indiviual markers genes before
# and after decontamination
plotDecontXMarkerExpression(sce, unlist(s$markers))

Get or set decontaminated counts matrix

Description

Gets or sets the decontaminated counts matrix from a a SingleCellExperiment object.

Usage

decontXcounts(object, ...)

decontXcounts(object, ...) <- value

## S4 method for signature 'SingleCellExperiment'
decontXcounts(object, ...)

## S4 replacement method for signature 'SingleCellExperiment'
decontXcounts(object, ...) <- value

Arguments

object

A SingleCellExperiment object.
...

For the generic, further arguments to pass to each method.
value

A matrix to save as an assay called decontXcounts

Value

If getting, the assay from object with the name decontXcounts will be returned. If setting, a SingleCellExperiment object will be returned with decontXcounts listed in the assay slot.

See Also

assay and assay<-

Create a color palette

Description

Generate a palette of 'n' distinct colors.

Usage

distinctColors(
  n,
  hues = c("red", "cyan", "orange", "blue", "yellow", "purple", "green", "magenta"),
  saturationRange = c(0.7, 1),
  valueRange = c(0.7, 1)
)

Arguments

n

Integer. Number of colors to generate.
hues

Character vector. Colors available from 'colors()'. These will be used as the base colors for the clustering scheme in HSV. Different saturations and values will be generated for each hue. Default c("red", "cyan", "orange", "blue", "yellow", "purple", "green", "magenta").
saturationRange

Numeric vector. A vector of length 2 denoting the saturation for HSV. Values must be in [0,1]. Default: c(0.25, 1).
valueRange

Numeric vector. A vector of length 2 denoting the range of values for HSV. Values must be in [0,1]. Default: 'c(0.5, 1)'.

Value

A vector of distinct colors that have been converted to HEX from HSV.

Examples

colorPal <- distinctColors(6) # can be used in plotting functions

Fast matrix multiplication for double x int

Description

Fast matrix multiplication for double x int

Usage

eigenMatMultInt(A, B)

Arguments

A

a double matrix
B

an integer matrix

Value

An integer matrix representing the product of A and B

Fast matrix multiplication for double x double

Description

Fast matrix multiplication for double x double

Usage

eigenMatMultNumeric(A, B)

Arguments

A

a double matrix
B

an integer matrix

Value

An integer matrix representing the product of A and B

Generate factorized matrices showing each feature's influence on cell / gene clustering

Description

Generates factorized matrices showing the contribution of each feature in each cell population or each cell population in each sample.

Usage

factorizeMatrix(
  x,
  celdaMod,
  useAssay = "counts",
  altExpName = "featureSubset",
  type = c("counts", "proportion", "posterior")
)

## S4 method for signature 'SingleCellExperiment,ANY'
factorizeMatrix(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  type = c("counts", "proportion", "posterior")
)

## S4 method for signature 'ANY,celda_CG'
factorizeMatrix(x, celdaMod, type = c("counts", "proportion", "posterior"))

## S4 method for signature 'ANY,celda_C'
factorizeMatrix(x, celdaMod, type = c("counts", "proportion", "posterior"))

## S4 method for signature 'ANY,celda_G'
factorizeMatrix(x, celdaMod, type = c("counts", "proportion", "posterior"))

Arguments

x

Can be one of

  • A SingleCellExperiment object returned by celda_C, celda_G or celda_CG, with the matrix located in the useAssay assay slot in altExp(x, altExpName). Rows represent features and columns represent cells.

  • Integer counts matrix. Rows represent features and columns represent cells. This matrix should be the same as the one used to generate celdaMod.
celdaMod

Celda model object. Only works if x is an integer counts matrix.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
type

Character vector. A vector containing one or more of "counts", "proportion", or "posterior". "counts" returns the raw number of counts for each factorized matrix. "proportions" returns the normalized probabilities for each factorized matrix, which are calculated by dividing the raw counts in each factorized matrix by the total counts in each column. "posterior" returns the posterior estimates which include the addition of the Dirichlet concentration parameter (essentially as a pseudocount). Default "counts".

Value

For celda_CG model, A list with elements for "counts", "proportions", or "posterior" probabilities. Each element will be a list containing factorized matrices for "module", "cellPopulation", and "sample". Additionally, the contribution of each module in each individual cell will be included in the "cell" element of "counts" and "proportions" elements.

For celda_C model, a list with elements for "counts", "proportions", or "posterior" probabilities. Each element will be a list containing factorized matrices for "module" and "sample".

For celda_G model, a list with elements for "counts", "proportions", or "posterior" probabilities. Each element will be a list containing factorized matrices for "module" and "cell".

Examples

data(sceCeldaCG)
factorizedMatrices <- factorizeMatrix(sceCeldaCG, type = "posterior")
data(celdaCGSim, celdaCGMod)
factorizedMatrices <- factorizeMatrix(
  celdaCGSim$counts,
  celdaCGMod,
  "posterior")
data(celdaCSim, celdaCMod)
factorizedMatrices <- factorizeMatrix(
  celdaCSim$counts,
  celdaCMod, "posterior"
)
data(celdaGSim, celdaGMod)
factorizedMatrices <- factorizeMatrix(
  celdaGSim$counts,
  celdaGMod, "posterior"
)

Fast normalization for numeric matrix

Description

Fast normalization for numeric matrix

Usage

fastNormProp(R_counts, R_alpha)

Arguments

R_counts

An integer matrix
R_alpha

A double value to be added to the matrix as a pseudocount

Value

A numeric matrix where the columns have been normalized to proportions

Fast normalization for numeric matrix

Description

Fast normalization for numeric matrix

Usage

fastNormPropLog(R_counts, R_alpha)

Arguments

R_counts

An integer matrix
R_alpha

A double value to be added to the matrix as a pseudocount

Value

A numeric matrix where the columns have been normalized to proportions

Fast normalization for numeric matrix

Description

Fast normalization for numeric matrix

Usage

fastNormPropSqrt(R_counts, R_alpha)

Arguments

R_counts

An integer matrix
R_alpha

A double value to be added to the matrix as a pseudocount

Value

A numeric matrix where the columns have been normalized to proportions

Obtain the gene module of a gene of interest

Description

This function will output the corresponding feature module for a specified vector of genes from a celda_CG or celda_G celdaModel. features must match the rownames of sce.

Usage

featureModuleLookup(
  sce,
  features,
  altExpName = "featureSubset",
  exactMatch = TRUE,
  by = "rownames"
)

## S4 method for signature 'SingleCellExperiment'
featureModuleLookup(
  sce,
  features,
  altExpName = "featureSubset",
  exactMatch = TRUE,
  by = "rownames"
)

Arguments

sce

A SingleCellExperiment object returned by celda_G, or celda_CG, with the matrix located in the useAssay assay slot. Rows represent features and columns represent cells.
features

Character vector. Identify feature modules for the specified feature names. feature must match the rownames of sce.
altExpName

The name for the altExp slot to use. Default "featureSubset".
exactMatch

Logical. Whether to look for exactMatch of the gene name within counts matrix. Default TRUE.
by

Character. Where to search for features in the sce object. If set to "rownames" then the features will be searched for among rownames(sce). This can also be set to one of the colnames of rowData(sce). Default "rownames".

Value

Numeric vector containing the module numbers for each feature. If the feature was not found, then an NA value will be returned in that position. If no features were found, then an error will be given.

Examples

data(sceCeldaCG)
module <- featureModuleLookup(sce = sceCeldaCG,
    features = c("Gene_1", "Gene_XXX"))

Output a feature module table

Description

Creates a table that contains the list of features in each feature module.

Usage

featureModuleTable(
  sce,
  useAssay = "counts",
  altExpName = "featureSubset",
  displayName = NULL,
  outputFile = NULL
)

Arguments

sce

A SingleCellExperiment object returned by celda_G, or celda_CG, with the matrix located in the useAssay assay slot. Rows represent features and columns represent cells.
useAssay

A string specifying which assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
displayName

Character. The column name of rowData(sce) that specifies the display names for the features. Default NULL, which displays the row names.
outputFile

File name for feature module table. If NULL, file will not be created. Default NULL.

Value

Matrix. Contains a list of features per each column (feature module)

Examples

data(sceCeldaCG)
featureModuleTable(sceCeldaCG)

Gene set enrichment

Description

Identify and return significantly-enriched terms for each gene module in a Celda object or a SingleCellExperiment object. Performs gene set enrichment analysis for Celda identified modules using the enrichr.

Usage

geneSetEnrich(
  x,
  celdaModel,
  useAssay = "counts",
  altExpName = "featureSubset",
  databases,
  fdr = 0.05
)

## S4 method for signature 'SingleCellExperiment'
geneSetEnrich(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  databases,
  fdr = 0.05
)

## S4 method for signature 'matrix'
geneSetEnrich(x, celdaModel, databases, fdr = 0.05)

Arguments

x

A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells. Rownames of the matrix or SingleCellExperiment object should be gene names.
celdaModel

Celda object of class celda_G or celda_CG.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
databases

Character vector. Name of reference database. Available databases can be viewed by listEnrichrDbs.
fdr

False discovery rate (FDR). Numeric. Cutoff value for adjusted p-value, terms with FDR below this value are considered significantly enriched.

Value

List of length 'L' where each member contains the significantly enriched terms for the corresponding module.

Author(s)

Ahmed Youssef, Zhe Wang

Examples

library(M3DExampleData)
counts <- M3DExampleData::Mmus_example_list$data
# subset 500 genes for fast clustering
counts <- counts[seq(1501, 2000), ]
# cluster genes into 10 modules for quick demo
sce <- celda_G(x = as.matrix(counts), L = 10, verbose = FALSE)
gse <- geneSetEnrich(sce,
  databases = c("GO_Biological_Process_2018", "GO_Molecular_Function_2018"))

Calculate the Log-likelihood of a celda model

Description

Calculate the log-likelihood for cell population and feature module cluster assignments on the count matrix, per celda model.

Usage

logLikelihood(x, celdaMod, useAssay = "counts", altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment,ANY'
logLikelihood(x, useAssay = "counts", altExpName = "featureSubset")

## S4 method for signature 'matrix,celda_C'
logLikelihood(x, celdaMod)

## S4 method for signature 'matrix,celda_G'
logLikelihood(x, celdaMod)

## S4 method for signature 'matrix,celda_CG'
logLikelihood(x, celdaMod)

Arguments

x

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG, with the matrix located in the useAssay assay slot. Rows represent features and columns represent cells.
celdaMod

celda model object. Ignored if x is a SingleCellExperiment object.
useAssay

A string specifying which assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

The log-likelihood of the cluster assignment for the provided SingleCellExperiment.

See Also

'celda_C()' for clustering cells

Examples

data(sceCeldaC, sceCeldaCG)
loglikC <- logLikelihood(sceCeldaC)
loglikCG <- logLikelihood(sceCeldaCG)

Get log-likelihood history

Description

Retrieves the complete log-likelihood from all iterations of Gibbs sampling used to generate a celda model.

Usage

logLikelihoodHistory(x, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
logLikelihoodHistory(x, altExpName = "featureSubset")

## S4 method for signature 'celdaModel'
logLikelihoodHistory(x)

Arguments

x

A SingleCellExperiment object returned by celda_C, celda_G, or celda_CG, or a celda model object.
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

Numeric. The log-likelihood at each step of Gibbs sampling used to generate the model.

Examples

data(sceCeldaCG)
logLikelihoodHistory(sceCeldaCG)
data(celdaCGMod)
logLikelihoodHistory(celdaCGMod)

Get feature, cell and sample names from a celdaModel

Description

Retrieves the row, column, and sample names used to generate a celdaModel.

Usage

matrixNames(celdaMod)

## S4 method for signature 'celdaModel'
matrixNames(celdaMod)

Arguments

celdaMod

celdaModel. Options available in 'celda::availableModels'.

Value

List. Contains row, column, and sample character vectors corresponding to the values provided when the celdaModel was generated.

Examples

data(celdaCGMod)
matrixNames(celdaCGMod)

Heatmap for featureModules

Description

Renders a heatmap for selected featureModule. Cells are ordered from those with the lowest probability of the module on the left to the highest probability on the right. Features are ordered from those with the highest probability in the module on the top to the lowest probability on the bottom.

Usage

moduleHeatmap(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  modules = NULL,
  featureModule = NULL,
  col = circlize::colorRamp2(c(-2, 0, 2), c("#1E90FF", "#FFFFFF", "#CD2626")),
  topCells = 100,
  topFeatures = NULL,
  normalizedCounts = NA,
  normalize = "proportion",
  transformationFun = sqrt,
  scaleRow = scale,
  showFeatureNames = TRUE,
  displayName = NULL,
  trim = c(-2, 2),
  rowFontSize = NULL,
  showHeatmapLegend = FALSE,
  showTopAnnotationLegend = FALSE,
  showTopAnnotationName = FALSE,
  topAnnotationHeight = 5,
  showModuleLabel = TRUE,
  moduleLabel = "auto",
  moduleLabelSize = NULL,
  byrow = TRUE,
  top = NA,
  unit = "mm",
  ncol = NULL,
  useRaster = TRUE,
  returnAsList = FALSE,
  ...
)

## S4 method for signature 'SingleCellExperiment'
moduleHeatmap(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  modules = NULL,
  featureModule = NULL,
  col = circlize::colorRamp2(c(-2, 0, 2), c("#1E90FF", "#FFFFFF", "#CD2626")),
  topCells = 100,
  topFeatures = NULL,
  normalizedCounts = NA,
  normalize = "proportion",
  transformationFun = sqrt,
  scaleRow = scale,
  showFeatureNames = TRUE,
  displayName = NULL,
  trim = c(-2, 2),
  rowFontSize = NULL,
  showHeatmapLegend = FALSE,
  showTopAnnotationLegend = FALSE,
  showTopAnnotationName = FALSE,
  topAnnotationHeight = 5,
  showModuleLabel = TRUE,
  moduleLabel = "auto",
  moduleLabelSize = NULL,
  byrow = TRUE,
  top = NA,
  unit = "mm",
  ncol = NULL,
  useRaster = TRUE,
  returnAsList = FALSE,
  ...
)

Arguments

x

A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells. Celda results must be present under metadata(altExp(x, altExpName)).
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
modules

Integer Vector. The featureModule(s) to display. Multiple modules can be included in a vector. Default NULL which plots all module heatmaps.
featureModule

Same as modules. Either can be used to specify the modules to display.
col

Passed to Heatmap. Set color boundaries and colors.
topCells

Integer. Number of cells with the highest and lowest probabilities for each module to include in the heatmap. For example, if topCells = 50, the 50 cells with the lowest probabilities and the 50 cells with the highest probabilities for each featureModule will be included. If NULL, all cells will be plotted. Default 100.
topFeatures

Integer. Plot 'topFeatures' features with the highest probabilities in the module heatmap for each featureModule. If NULL, plot all features in the module. Default NULL.
normalizedCounts

Integer matrix. Rows represent features and columns represent cells. If you have a normalized matrix result from normalizeCounts, you can pass through the result here to skip the normalization step in this function. Make sure the colnames and rownames match the object in x. This matrix should correspond to one generated from this count matrix assay(altExp(x, altExpName), i = useAssay). If NA, normalization will be carried out in the following form normalizeCounts(assay(altExp(x, altExpName), i = useAssay), normalize = "proportion", transformationFun = sqrt). Use of this parameter is particularly useful for plotting many module heatmaps, where normalizing the counts matrix repeatedly would be too time consuming. Default NA.
normalize

Character. Passed to normalizeCounts if normalizedCounts is NA. Divides counts by the library sizes for each cell. One of 'proportion', 'cpm', 'median', or 'mean'. 'proportion' uses the total counts for each cell as the library size. 'cpm' divides the library size of each cell by one million to produce counts per million. 'median' divides the library size of each cell by the median library size across all cells. 'mean' divides the library size of each cell by the mean library size across all cells. Default "proportion".
transformationFun

Function. Passed to normalizeCounts if normalizedCounts is NA. Applies a transformation such as sqrt, log, log2, log10, or log1p. If NULL, no transformation will be applied. Occurs after normalization. Default sqrt.
scaleRow

Function. Which function to use to scale each individual row. Set to NULL to disable. Occurs after normalization and log transformation. For example, scale will Z-score transform each row. Default scale.
showFeatureNames

Logical. Whether feature names should be displayed. Default TRUE.
displayName

Character. The column name of rowData(altExp(x, altExpName)) that specifies the display names for the features. Default NULL, which displays the row names. Only works if showFeaturenames is TRUE and x is a SingleCellExperiment object.
trim

Numeric vector. Vector of length two that specifies the lower and upper bounds for plotting the data. This threshold is applied after row scaling. Set to NULL to disable. Default c(-2,2).
rowFontSize

Numeric. Font size for feature names. If NULL, then the size will automatically be determined. Default NULL.
showHeatmapLegend

Passed to Heatmap. Show legend for expression levels.
showTopAnnotationLegend

Passed to HeatmapAnnotation. Show legend for cell annotation.
showTopAnnotationName

Passed to HeatmapAnnotation. Show heatmap top annotation name.
topAnnotationHeight

Passed to HeatmapAnnotation. Column annotation height. rowAnnotation. Show legend for module annotation.
showModuleLabel

Show left side module labels.
moduleLabel

The left side row titles for module heatmap. Must be vector of the same length as featureModule. Default "auto", which automatically pulls module labels from x.
moduleLabelSize

Passed to gpar. The size of text (in points).
byrow

Passed to matrix. logical. If FALSE (the default) the figure panel is filled by columns, otherwise the figure panel is filled by rows.
top

Passed to marrangeGrob. The title for each page.
unit

Passed to unit. Single character object defining the unit of all dimensions defined.
ncol

Integer. Number of columns of module heatmaps. If NULL, then this will be automatically calculated so that the number of columns and rows will be approximately the same. Default NULL.
useRaster

Boolean. Rasterizing will make the heatmap a single object and reduced the memory of the plot and the size of a file. If NULL, then rasterization will be automatically determined by the underlying Heatmap function. Default TRUE.
returnAsList

Boolean. If TRUE, then a list of plots will be returned instead of a single multi-panel figure. These plots can be displayed using the grid.draw function. Default FALSE.
...

Additional parameters passed to Heatmap.

Value

A list object if plotting more than one module heatmaps. Otherwise a HeatmapList object is returned.

Examples

data(sceCeldaCG)
moduleHeatmap(sceCeldaCG, displayName = "rownames")

get row and column indices of none zero elements in the matrix

Description

get row and column indices of none zero elements in the matrix

Usage

nonzero(R_counts)

Arguments

R_counts

A matrix

Value

An integer matrix where each row is a row, column indices pair

Normalization of count data

Description

Performs normalization, transformation, and/or scaling of a counts matrix

Usage

normalizeCounts(
  counts,
  normalize = c("proportion", "cpm", "median", "mean"),
  scaleFactor = NULL,
  transformationFun = NULL,
  scaleFun = NULL,
  pseudocountNormalize = 0,
  pseudocountTransform = 0
)

Arguments

counts

Integer, Numeric or Sparse matrix. Rows represent features and columns represent cells.
normalize

Character. Divides counts by the library sizes for each cell. One of 'proportion', 'cpm', 'median', or 'mean'. 'proportion' uses the total counts for each cell as the library size. 'cpm' divides the library size of each cell by one million to produce counts per million. 'median' divides the library size of each cell by the median library size across all cells. 'mean' divides the library size of each cell by the mean library size across all cells.
scaleFactor

Numeric. Sets the scale factor for cell-level normalization. This scale factor is multiplied to each cell after the library size of each cell had been adjusted in normalize. Default NULL which means no scale factor is applied.
transformationFun

Function. Applys a transformation such as sqrt, log, log2, log10, or log1p. If NULL, no transformation will be applied. Occurs after normalization. Default NULL.
scaleFun

Function. Scales the rows of the normalized and transformed count matrix. For example, 'scale' can be used to z-score normalize the rows. Default NULL.
pseudocountNormalize

Numeric. Add a pseudocount to counts before normalization. Default 0.
pseudocountTransform

Numeric. Add a pseudocount to normalized counts before applying the transformation function. Adding a pseudocount can be useful before applying a log transformation. Default 0.

Value

Numeric Matrix. A normalized matrix.

Examples

data(celdaCGSim)
normalizedCounts <- normalizeCounts(celdaCGSim$counts, "proportion",
  pseudocountNormalize = 1)

Get parameter values provided for celdaModel creation

Description

Retrieves the K/L, model priors (e.g. alpha, beta), and count matrix checksum parameters provided during the creation of the provided celdaModel.

Usage

params(celdaMod)

## S4 method for signature 'celdaModel'
params(celdaMod)

Arguments

celdaMod

celdaModel. Options available in celda::availableModels.

Value

List. Contains the model-specific parameters for the provided celda model object depending on its class.

Examples

data(celdaCGMod)
params(celdaCGMod)

Calculate the perplexity of a celda model

Description

Perplexity is a statistical measure of how well a probability model can predict new data. Lower perplexity indicates a better model.

Usage

perplexity(
  x,
  celdaMod,
  useAssay = "counts",
  altExpName = "featureSubset",
  newCounts = NULL
)

## S4 method for signature 'SingleCellExperiment,ANY'
perplexity(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  newCounts = NULL
)

## S4 method for signature 'ANY,celda_CG'
perplexity(x, celdaMod, newCounts = NULL)

## S4 method for signature 'ANY,celda_C'
perplexity(x, celdaMod, newCounts = NULL)

## S4 method for signature 'ANY,celda_G'
perplexity(x, celdaMod, newCounts = NULL)

Arguments

x

Can be one of

  • A SingleCellExperiment object returned by celda_C, celda_G or celda_CG, with the matrix located in the useAssay assay slot. Rows represent features and columns represent cells.

  • Integer counts matrix. Rows represent features and columns represent cells. This matrix should be the same as the one used to generate celdaMod.
celdaMod

Celda model object. Only works if x is an integer counts matrix.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
newCounts

A new counts matrix used to calculate perplexity. If NULL, perplexity will be calculated for the matrix in useAssay slot in x. Default NULL.

Value

Numeric. The perplexity for the provided x (and celdaModel).

Examples

data(sceCeldaCG)
perplexity <- perplexity(sceCeldaCG)
data(celdaCGSim, celdaCGMod)
perplexity <- perplexity(celdaCGSim$counts, celdaCGMod)
data(celdaCSim, celdaCMod)
perplexity <- perplexity(celdaCSim$counts, celdaCMod)
data(celdaGSim, celdaGMod)
perplexity <- perplexity(celdaGSim$counts, celdaGMod)

Feature Expression Violin Plot

Description

Outputs a violin plot for feature expression data.

Usage

plotCeldaViolin(
  x,
  celdaMod,
  features,
  displayName = NULL,
  useAssay = "counts",
  altExpName = "featureSubset",
  exactMatch = TRUE,
  plotDots = TRUE,
  dotSize = 0.1
)

## S4 method for signature 'SingleCellExperiment'
plotCeldaViolin(
  x,
  features,
  displayName = NULL,
  useAssay = "counts",
  altExpName = "featureSubset",
  exactMatch = TRUE,
  plotDots = TRUE,
  dotSize = 0.1
)

## S4 method for signature 'ANY'
plotCeldaViolin(
  x,
  celdaMod,
  features,
  exactMatch = TRUE,
  plotDots = TRUE,
  dotSize = 0.1
)

Arguments

x

Numeric matrix or a SingleCellExperiment object with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
celdaMod

Celda object of class "celda_G" or "celda_CG". Used only if x is a matrix object.
features

Character vector. Uses these genes for plotting.
displayName

Character. The column name of rowData(x) that specifies the display names for the features. Default NULL, which displays the row names. Only works if x is a SingleCellExperiment object.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
exactMatch

Logical. Whether an exact match or a partial match using grep() is used to look up the feature in the rownames of the counts matrix. Default TRUE.
plotDots

Boolean. If TRUE, the expression of features will be plotted as points in addition to the violin curve. Default TRUE.
dotSize

Numeric. Size of points if plotDots = TRUE. Default 0.1.

Value

Violin plot for each feature, grouped by celda cluster

Examples

data(sceCeldaCG)
plotCeldaViolin(x = sceCeldaCG, features = "Gene_1")
data(celdaCGSim, celdaCGMod)
plotCeldaViolin(x = celdaCGSim$counts,
   celdaMod = celdaCGMod,
   features = "Gene_1")

Plots contamination on UMAP coordinates

Description

A scatter plot of the UMAP dimensions generated by DecontX with cells colored by the estimated percentation of contamation.

Usage

plotDecontXContamination(
  x,
  batch = NULL,
  colorScale = c("blue", "green", "yellow", "orange", "red"),
  size = 1
)

Arguments

x

Either a SingleCellExperiment with decontX results stored in metadata(x)$decontX or the result from running decontX on a count matrix.
batch

Character. Batch of cells to plot. If NULL, then the first batch in the list will be selected. Default NULL.
colorScale

Character vector. Contains the color spectrum to be passed to scale_colour_gradientn from package 'ggplot2'. Default c("blue","green","yellow","orange","red").
size

Numeric. Size of points in the scatterplot. Default 1.

Value

Returns a ggplot object.

Author(s)

Shiyi Yang, Joshua Campbell

See Also

See decontX for a full example of how to estimate and plot contamination.

Plots expression of marker genes before and after decontamination

Description

Generates a violin plot that shows the counts of marker genes in cells across specific clusters or cell types. Can be used to view the expression of marker genes in different cell types before and after decontamination with decontX.

Usage

plotDecontXMarkerExpression(
  x,
  markers,
  groupClusters = NULL,
  assayName = c("counts", "decontXcounts"),
  z = NULL,
  exactMatch = TRUE,
  by = "rownames",
  log1p = FALSE,
  ncol = NULL,
  plotDots = FALSE,
  dotSize = 0.1
)

Arguments

x

Either a SingleCellExperiment or a matrix-like object of counts.
markers

Character Vector or List. A character vector or list of character vectors with the names of the marker genes of interest.
groupClusters

List. A named list that allows cell clusters labels coded in z to be regrouped and renamed on the fly. For example, list(Tcells=c(1, 2), Bcells=7) would recode clusters 1 and 2 to "Tcells" and cluster 7 to "Bcells". Note that if this is used, clusters in z not found in groupClusters will be excluded. Default NULL.
assayName

Character vector. Name(s) of the assay(s) to plot if x is a SingleCellExperiment. If more than one assay is listed, then side-by-side violin plots will be generated. Default c("counts", "decontXcounts").
z

Character, Integer, or Vector. Indicates the cluster labels for each cell. If x is a SingleCellExperiment and z = NULL, then the cluster labels from decontX will be retreived from the colData of x (i.e. colData(x)$decontX_clusters). If z is a single character or integer, then that column will be retrived from colData of x. (i.e. colData(x)[,z]). If x is a counts matrix, then z will need to be a vector the same length as the number of columns in x that indicate the cluster to which each cell belongs. Default NULL.
exactMatch

Boolean. Whether to only identify exact matches for the markers or to identify partial matches using grep. See retrieveFeatureIndex for more details. Default TRUE.
by

Character. Where to search for the markers if x is a SingleCellExperiment. See retrieveFeatureIndex for more details. If x is a matrix, then this must be set to "rownames". Default "rownames".
log1p

Boolean. Whether to apply the function log1p to the data before plotting. This function will add a pseudocount of 1 and then log transform the expression values. Default FALSE.
ncol

Integer. Number of columns to make in the plot. Default NULL.
plotDots

Boolean. If TRUE, the expression of features will be plotted as points in addition to the violin curve. Default FALSE.
dotSize

Numeric. Size of points if plotDots = TRUE. Default 0.1.

Value

Returns a ggplot object.

Author(s)

Shiyi Yang, Joshua Campbell

See Also

See decontX for a full example of how to estimate and plot contamination.

Plots percentage of cells cell types expressing markers

Description

Generates a barplot that shows the percentage of cells within clusters or cell types that have detectable levels of given marker genes. Can be used to view the expression of marker genes in different cell types before and after decontamination with decontX.

Usage

plotDecontXMarkerPercentage(
  x,
  markers,
  groupClusters = NULL,
  assayName = c("counts", "decontXcounts"),
  z = NULL,
  threshold = 1,
  exactMatch = TRUE,
  by = "rownames",
  ncol = round(sqrt(length(markers))),
  labelBars = TRUE,
  labelSize = 3
)

Arguments

x

Either a SingleCellExperiment or a matrix-like object of counts.
markers

List. A named list indicating the marker genes for each cell type of interest. Multiple markers can be supplied for each cell type. For example, list(Tcell_Markers=c("CD3E", "CD3D"), Bcell_Markers=c("CD79A", "CD79B", "MS4A1") would specify markers for human T-cells and B-cells. A cell will be considered "positive" for a cell type if it has a count greater than threshold for at least one of the marker genes in the list.
groupClusters

List. A named list that allows cell clusters labels coded in z to be regrouped and renamed on the fly. For example, list(Tcells=c(1, 2), Bcells=7) would recode clusters 1 and 2 to "Tcells" and cluster 7 to "Bcells". Note that if this is used, clusters in z not found in groupClusters will be excluded from the barplot. Default NULL.
assayName

Character vector. Name(s) of the assay(s) to plot if x is a SingleCellExperiment. If more than one assay is listed, then side-by-side barplots will be generated. Default c("counts", "decontXcounts").
z

Character, Integer, or Vector. Indicates the cluster labels for each cell. If x is a SingleCellExperiment and z = NULL, then the cluster labels from decontX will be retived from the colData of x (i.e. colData(x)$decontX_clusters). If z is a single character or integer, then that column will be retrived from colData of x. (i.e. colData(x)[,z]). If x is a counts matrix, then z will need to be a vector the same length as the number of columns in x that indicate the cluster to which each cell belongs. Default NULL.
threshold

Numeric. Markers greater than or equal to this value will be considered detected in a cell. Default 1.
exactMatch

Boolean. Whether to only identify exact matches for the markers or to identify partial matches using grep. See retrieveFeatureIndex for more details. Default TRUE.
by

Character. Where to search for the markers if x is a SingleCellExperiment. See retrieveFeatureIndex for more details. If x is a matrix, then this must be set to "rownames".Default "rownames".
ncol

Integer. Number of columns to make in the plot. Default round(sqrt(length(markers)).
labelBars

Boolean. Whether to display percentages above each bar Default TRUE.
labelSize

Numeric. Size of the percentage labels in the barplot. Default 3.

Value

Returns a ggplot object.

Author(s)

Shiyi Yang, Joshua Campbell

See Also

See decontX for a full example of how to estimate and plot contamination.

Plotting the cell labels on a dimension reduction plot

Description

Create a scatterplot for each row of a normalized gene expression matrix where x and y axis are from a data dimension reduction tool. The cells are colored by "celda_cell_cluster" column in colData(altExp(x, altExpName)) if x is a SingleCellExperiment object, or x if x is a integer vector of cell cluster labels.

Usage

plotDimReduceCluster(
  x,
  reducedDimName,
  altExpName = "featureSubset",
  dim1 = NULL,
  dim2 = NULL,
  size = 0.5,
  xlab = NULL,
  ylab = NULL,
  specificClusters = NULL,
  labelClusters = FALSE,
  groupBy = NULL,
  labelSize = 3.5
)

## S4 method for signature 'SingleCellExperiment'
plotDimReduceCluster(
  x,
  reducedDimName,
  altExpName = "featureSubset",
  dim1 = 1,
  dim2 = 2,
  size = 0.5,
  xlab = NULL,
  ylab = NULL,
  specificClusters = NULL,
  labelClusters = FALSE,
  groupBy = NULL,
  labelSize = 3.5
)

## S4 method for signature 'vector'
plotDimReduceCluster(
  x,
  dim1,
  dim2,
  size = 0.5,
  xlab = "Dimension_1",
  ylab = "Dimension_2",
  specificClusters = NULL,
  labelClusters = FALSE,
  groupBy = NULL,
  labelSize = 3.5
)

Arguments

x

Integer vector of cell cluster labels or a SingleCellExperiment object containing cluster labels for each cell in "celda_cell_cluster" column in colData(x).
reducedDimName

The name of the dimension reduction slot in reducedDimNames(x) if x is a SingleCellExperiment object. Ignored if both dim1 and dim2 are set.
altExpName

The name for the altExp slot to use. Default "featureSubset".
dim1

Integer or numeric vector. If reducedDimName is supplied, then, this will be used as an index to determine which dimension will be plotted on the x-axis. If reducedDimName is not supplied, then this should be a vector which will be plotted on the x-axis. Default 1.
dim2

Integer or numeric vector. If reducedDimName is supplied, then, this will be used as an index to determine which dimension will be plotted on the y-axis. If reducedDimName is not supplied, then this should be a vector which will be plotted on the y-axis. Default 2.
size

Numeric. Sets size of point on plot. Default 0.5.
xlab

Character vector. Label for the x-axis. Default NULL.
ylab

Character vector. Label for the y-axis. Default NULL.
specificClusters

Numeric vector. Only color cells in the specified clusters. All other cells will be grey. If NULL, all clusters will be colored. Default NULL.
labelClusters

Logical. Whether the cluster labels are plotted. Default FALSE.
groupBy

Character vector. Contains sample labels for each cell. If NULL, all samples will be plotted together. Default NULL.
labelSize

Numeric. Sets size of label if labelClusters is TRUE. Default 3.5.

Value

The plot as a ggplot object

Examples

data(sceCeldaCG)
sce <- celdaTsne(sceCeldaCG)
plotDimReduceCluster(x = sce,
  reducedDimName = "celda_tSNE",
  specificClusters = c(1, 2, 3))
library(SingleCellExperiment)
data(sceCeldaCG, celdaCGMod)
sce <- celdaTsne(sceCeldaCG)
plotDimReduceCluster(x = celdaClusters(celdaCGMod)$z,
  dim1 = reducedDim(altExp(sce), "celda_tSNE")[, 1],
  dim2 = reducedDim(altExp(sce), "celda_tSNE")[, 2],
  specificClusters = c(1, 2, 3))

Plotting feature expression on a dimension reduction plot

Description

Create a scatterplot for each row of a normalized gene expression matrix where x and y axis are from a data dimension reduction tool. The cells are colored by expression of the specified feature.

Usage

plotDimReduceFeature(
  x,
  features,
  reducedDimName = NULL,
  displayName = NULL,
  dim1 = NULL,
  dim2 = NULL,
  headers = NULL,
  useAssay = "counts",
  altExpName = "featureSubset",
  normalize = FALSE,
  zscore = TRUE,
  exactMatch = TRUE,
  trim = c(-2, 2),
  limits = c(-2, 2),
  size = 0.5,
  xlab = NULL,
  ylab = NULL,
  colorLow = "blue4",
  colorMid = "grey90",
  colorHigh = "firebrick1",
  midpoint = 0,
  ncol = NULL,
  decreasing = FALSE
)

## S4 method for signature 'SingleCellExperiment'
plotDimReduceFeature(
  x,
  features,
  reducedDimName = NULL,
  displayName = NULL,
  dim1 = 1,
  dim2 = 2,
  headers = NULL,
  useAssay = "counts",
  altExpName = "featureSubset",
  normalize = FALSE,
  zscore = TRUE,
  exactMatch = TRUE,
  trim = c(-2, 2),
  limits = c(-2, 2),
  size = 0.5,
  xlab = NULL,
  ylab = NULL,
  colorLow = "blue4",
  colorMid = "grey90",
  colorHigh = "firebrick1",
  midpoint = 0,
  ncol = NULL,
  decreasing = FALSE
)

## S4 method for signature 'ANY'
plotDimReduceFeature(
  x,
  features,
  dim1,
  dim2,
  headers = NULL,
  normalize = FALSE,
  zscore = TRUE,
  exactMatch = TRUE,
  trim = c(-2, 2),
  limits = c(-2, 2),
  size = 0.5,
  xlab = "Dimension_1",
  ylab = "Dimension_2",
  colorLow = "blue4",
  colorMid = "grey90",
  colorHigh = "firebrick1",
  midpoint = 0,
  ncol = NULL,
  decreasing = FALSE
)

Arguments

x

Numeric matrix or a SingleCellExperiment object with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
features

Character vector. Features in the rownames of counts to plot.
reducedDimName

The name of the dimension reduction slot in reducedDimNames(x) if x is a SingleCellExperiment object. If NULL, then both dim1 and dim2 need to be set. Default NULL.
displayName

Character. The column name of rowData(x) that specifies the display names for the features. Default NULL, which displays the row names. Only works if x is a SingleCellExperiment object. Overwrites headers.
dim1

Integer or numeric vector. If reducedDimName is supplied, then, this will be used as an index to determine which dimension will be plotted on the x-axis. If reducedDimName is not supplied, then this should be a vector which will be plotted on the x-axis. Default 1.
dim2

Integer or numeric vector. If reducedDimName is supplied, then, this will be used as an index to determine which dimension will be plotted on the y-axis. If reducedDimName is not supplied, then this should be a vector which will be plotted on the y-axis. Default 2.
headers

Character vector. If NULL, the corresponding rownames are used as labels. Otherwise, these headers are used to label the features. Only works if displayName is NULL and exactMatch is FALSE.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
normalize

Logical. Whether to normalize the columns of 'counts'. Default FALSE.
zscore

Logical. Whether to scale each feature to have a mean 0 and standard deviation of 1. Default TRUE.
exactMatch

Logical. Whether an exact match or a partial match using grep() is used to look up the feature in the rownames of the counts matrix. Default TRUE.
trim

Numeric vector. Vector of length two that specifies the lower and upper bounds for the data. This threshold is applied after row scaling. Set to NULL to disable. Default c(-1,1).
limits

Passed to scale_colour_gradient2. The range of color scale.
size

Numeric. Sets size of point on plot. Default 1.
xlab

Character vector. Label for the x-axis. If reducedDimName is used, then this will be set to the column name of the first dimension of that object. Default "Dimension_1".
ylab

Character vector. Label for the y-axis. If reducedDimName is used, then this will be set to the column name of the second dimension of that object. Default "Dimension_2".
colorLow

Character. A color available from 'colors()'. The color will be used to signify the lowest values on the scale.
colorMid

Character. A color available from 'colors()'. The color will be used to signify the midpoint on the scale.
colorHigh

Character. A color available from 'colors()'. The color will be used to signify the highest values on the scale.
midpoint

Numeric. The value indicating the midpoint of the diverging color scheme. If NULL, defaults to the mean with 10 percent of values trimmed. Default 0.
ncol

Integer. Passed to facet_wrap. Specify the number of columns for facet wrap.
decreasing

logical. Specifies the order of plotting the points. If FALSE, the points will be plotted in increasing order where the points with largest values will be on top. TRUE otherwise. If NULL, no sorting is performed. Points will be plotted in their current order in x. Default FALSE.

Value

The plot as a ggplot object

Examples

data(sceCeldaCG)
sce <- celdaTsne(sceCeldaCG)
plotDimReduceFeature(x = sce,
  reducedDimName = "celda_tSNE",
  normalize = TRUE,
  features = c("Gene_98", "Gene_99"),
  exactMatch = TRUE)
library(SingleCellExperiment)
data(sceCeldaCG)
sce <- celdaTsne(sceCeldaCG)
plotDimReduceFeature(x = counts(sce),
  dim1 = reducedDim(altExp(sce), "celda_tSNE")[, 1],
  dim2 = reducedDim(altExp(sce), "celda_tSNE")[, 2],
  normalize = TRUE,
  features = c("Gene_98", "Gene_99"),
  exactMatch = TRUE)

Mapping the dimension reduction plot

Description

Creates a scatterplot given two dimensions from a data dimension reduction tool (e.g tSNE) output.

Usage

plotDimReduceGrid(
  x,
  reducedDimName,
  dim1 = NULL,
  dim2 = NULL,
  useAssay = "counts",
  altExpName = "featureSubset",
  size = 1,
  xlab = "Dimension_1",
  ylab = "Dimension_2",
  limits = c(-2, 2),
  colorLow = "blue4",
  colorMid = "grey90",
  colorHigh = "firebrick1",
  midpoint = 0,
  varLabel = NULL,
  ncol = NULL,
  headers = NULL,
  decreasing = FALSE
)

## S4 method for signature 'SingleCellExperiment'
plotDimReduceGrid(
  x,
  reducedDimName,
  dim1 = NULL,
  dim2 = NULL,
  useAssay = "counts",
  altExpName = "featureSubset",
  size = 1,
  xlab = "Dimension_1",
  ylab = "Dimension_2",
  limits = c(-2, 2),
  colorLow = "blue4",
  colorMid = "grey90",
  colorHigh = "firebrick1",
  midpoint = 0,
  varLabel = NULL,
  ncol = NULL,
  headers = NULL,
  decreasing = FALSE
)

## S4 method for signature 'ANY'
plotDimReduceGrid(
  x,
  dim1,
  dim2,
  size = 1,
  xlab = "Dimension_1",
  ylab = "Dimension_2",
  limits = c(-2, 2),
  colorLow = "blue4",
  colorMid = "grey90",
  colorHigh = "firebrick1",
  midpoint = 0,
  varLabel = NULL,
  ncol = NULL,
  headers = NULL,
  decreasing = FALSE
)

Arguments

x

Numeric matrix or a SingleCellExperiment object with the matrix located in the assay slot under useAssay. Each row of the matrix will be plotted as a separate facet.
reducedDimName

The name of the dimension reduction slot in reducedDimNames(x) if x is a SingleCellExperiment object. Ignored if both dim1 and dim2 are set.
dim1

Numeric vector. Second dimension from data dimension reduction output.
dim2

Numeric vector. Second dimension from data dimension reduction output.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
size

Numeric. Sets size of point on plot. Default 1.
xlab

Character vector. Label for the x-axis. Default 'Dimension_1'.
ylab

Character vector. Label for the y-axis. Default 'Dimension_2'.
limits

Passed to scale_colour_gradient2. The range of color scale.
colorLow

Character. A color available from 'colors()'. The color will be used to signify the lowest values on the scale. Default "blue4".
colorMid

Character. A color available from 'colors()'. The color will be used to signify the midpoint on the scale. Default "grey90".
colorHigh

Character. A color available from 'colors()'. The color will be used to signify the highest values on the scale. Default "firebrick1".
midpoint

Numeric. The value indicating the midpoint of the diverging color scheme. If NULL, defaults to the mean with 10 percent of values trimmed. Default 0.
varLabel

Character vector. Title for the color legend.
ncol

Integer. Passed to facet_wrap. Specify the number of columns for facet wrap.
headers

Character vector. If 'NULL', the corresponding rownames are used as labels. Otherwise, these headers are used to label the genes.
decreasing

logical. Specifies the order of plotting the points. If FALSE, the points will be plotted in increasing order where the points with largest values will be on top. TRUE otherwise. If NULL, no sorting is performed. Points will be plotted in their current order in x. Default FALSE.

Value

The plot as a ggplot object

Examples

data(sceCeldaCG)
sce <- celdaTsne(sceCeldaCG)
plotDimReduceGrid(x = sce,
  reducedDimName = "celda_tSNE",
  xlab = "Dimension1",
  ylab = "Dimension2",
  varLabel = "tSNE")
library(SingleCellExperiment)
data(sceCeldaCG)
sce <- celdaTsne(sceCeldaCG)
plotDimReduceGrid(x = counts(sce),
  dim1 = reducedDim(altExp(sce), "celda_tSNE")[, 1],
  dim2 = reducedDim(altExp(sce), "celda_tSNE")[, 2],
  xlab = "Dimension1",
  ylab = "Dimension2",
  varLabel = "tSNE")

Plotting Celda module probability on a dimension reduction plot

Description

Create a scatterplot for each row of a normalized gene expression matrix where x and y axis are from a data dimension reduction tool. The cells are colored by the module probability.

Usage

plotDimReduceModule(
  x,
  reducedDimName,
  useAssay = "counts",
  altExpName = "featureSubset",
  celdaMod,
  modules = NULL,
  dim1 = NULL,
  dim2 = NULL,
  size = 0.5,
  xlab = NULL,
  ylab = NULL,
  rescale = TRUE,
  limits = c(0, 1),
  colorLow = "grey90",
  colorHigh = "firebrick1",
  ncol = NULL,
  decreasing = FALSE
)

## S4 method for signature 'SingleCellExperiment'
plotDimReduceModule(
  x,
  reducedDimName,
  useAssay = "counts",
  altExpName = "featureSubset",
  modules = NULL,
  dim1 = 1,
  dim2 = 2,
  size = 0.5,
  xlab = NULL,
  ylab = NULL,
  rescale = TRUE,
  limits = c(0, 1),
  colorLow = "grey90",
  colorHigh = "firebrick1",
  ncol = NULL,
  decreasing = FALSE
)

## S4 method for signature 'ANY'
plotDimReduceModule(
  x,
  celdaMod,
  modules = NULL,
  dim1,
  dim2,
  size = 0.5,
  xlab = "Dimension_1",
  ylab = "Dimension_2",
  rescale = TRUE,
  limits = c(0, 1),
  colorLow = "grey90",
  colorHigh = "firebrick1",
  ncol = NULL,
  decreasing = FALSE
)

Arguments

x

Numeric matrix or a SingleCellExperiment object with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
reducedDimName

The name of the dimension reduction slot in reducedDimNames(x) if x is a SingleCellExperiment object. Ignored if both dim1 and dim2 are set.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
celdaMod

Celda object of class "celda_G" or "celda_CG". Used only if x is a matrix object.
modules

Character vector. Module(s) from celda model to be plotted. e.g. c("1", "2").
dim1

Integer or numeric vector. If reducedDimName is supplied, then, this will be used as an index to determine which dimension will be plotted on the x-axis. If reducedDimName is not supplied, then this should be a vector which will be plotted on the x-axis. Default 1.
dim2

Integer or numeric vector. If reducedDimName is supplied, then, this will be used as an index to determine which dimension will be plotted on the y-axis. If reducedDimName is not supplied, then this should be a vector which will be plotted on the y-axis. Default 2.
size

Numeric. Sets size of point on plot. Default 0.5.
xlab

Character vector. Label for the x-axis. Default "Dimension_1".
ylab

Character vector. Label for the y-axis. Default "Dimension_2".
rescale

Logical. Whether rows of the matrix should be rescaled to [0, 1]. Default TRUE.
limits

Passed to scale_colour_gradient. The range of color scale.
colorLow

Character. A color available from 'colors()'. The color will be used to signify the lowest values on the scale.
colorHigh

Character. A color available from 'colors()'. The color will be used to signify the highest values on the scale.
ncol

Integer. Passed to facet_wrap. Specify the number of columns for facet wrap.
decreasing

logical. Specifies the order of plotting the points. If FALSE, the points will be plotted in increasing order where the points with largest values will be on top. TRUE otherwise. If NULL, no sorting is performed. Points will be plotted in their current order in x. Default FALSE.

Value

The plot as a ggplot object

Examples

data(sceCeldaCG)
sce <- celdaTsne(sceCeldaCG)
plotDimReduceModule(x = sce,
  reducedDimName = "celda_tSNE",
  modules = c("1", "2"))
library(SingleCellExperiment)
data(sceCeldaCG, celdaCGMod)
sce <- celdaTsne(sceCeldaCG)
plotDimReduceModule(x = counts(sce),
  dim1 = reducedDim(altExp(sce), "celda_tSNE")[, 1],
  dim2 = reducedDim(altExp(sce), "celda_tSNE")[, 2],
  celdaMod = celdaCGMod,
  modules = c("1", "2"))

Visualize perplexity of a list of celda models

Description

Visualize perplexity of every model in a celdaList, by unique K/L combinations

Usage

plotGridSearchPerplexity(x, altExpName = "featureSubset", sep = 5, alpha = 0.5)

## S4 method for signature 'SingleCellExperiment'
plotGridSearchPerplexity(x, altExpName = "featureSubset", sep = 5, alpha = 0.5)

## S4 method for signature 'celdaList'
plotGridSearchPerplexity(x, sep = 5, alpha = 0.5)

Arguments

x

Can be one of

  • A SingleCellExperiment object returned from celdaGridSearch, recursiveSplitModule, or recursiveSplitCell. Must contain a list named "celda_grid_search" in metadata(x).

  • celdaList object.
altExpName

The name for the altExp slot to use. Default "featureSubset". Only works if x is a SingleCellExperiment object.
sep

Numeric. Breaks in the x axis of the resulting plot.
alpha

Numeric. Passed to geom_jitter. Opacity of the points. Values of alpha range from 0 to 1, with lower values corresponding to more transparent colors.

Value

A ggplot plot object showing perplexity as a function of clustering parameters.

Examples

data(sceCeldaCGGridSearch)
sce <- resamplePerplexity(sceCeldaCGGridSearch)
plotGridSearchPerplexity(sce)
data(celdaCGSim, celdaCGGridSearchRes)
## Run various combinations of parameters with 'celdaGridSearch'
celdaCGGridSearchRes <- resamplePerplexity(
  celdaCGSim$counts,
  celdaCGGridSearchRes)
plotGridSearchPerplexity(celdaCGGridSearchRes)

Plots heatmap based on Celda model

Description

Renders a heatmap based on a matrix of counts where rows are features and columns are cells.

Usage

plotHeatmap(
  counts,
  z = NULL,
  y = NULL,
  scaleRow = scale,
  trim = c(-2, 2),
  featureIx = NULL,
  cellIx = NULL,
  clusterFeature = TRUE,
  clusterCell = TRUE,
  colorScheme = c("divergent", "sequential"),
  colorSchemeSymmetric = TRUE,
  colorSchemeCenter = 0,
  col = NULL,
  annotationCell = NULL,
  annotationFeature = NULL,
  annotationColor = NULL,
  breaks = NULL,
  legend = TRUE,
  annotationLegend = TRUE,
  annotationNamesFeature = TRUE,
  annotationNamesCell = TRUE,
  showNamesFeature = FALSE,
  showNamesCell = FALSE,
  rowGroupOrder = NULL,
  colGroupOrder = NULL,
  hclustMethod = "ward.D2",
  treeheightFeature = ifelse(clusterFeature, 50, 0),
  treeheightCell = ifelse(clusterCell, 50, 0),
  silent = FALSE,
  ...
)

Arguments

counts

Numeric or sparse matrix. Normalized counts matrix where rows represent features and columns represent cells. .
z

Numeric vector. Denotes cell population labels.
y

Numeric vector. Denotes feature module labels.
scaleRow

Function. A function to scale each individual row. Set to NULL to disable. Occurs after normalization and log transformation. Defualt is 'scale' and thus will Z-score transform each row.
trim

Numeric vector. Vector of length two that specifies the lower and upper bounds for the data. This threshold is applied after row scaling. Set to NULL to disable. Default c(-2,2).
featureIx

Integer vector. Select features for display in heatmap. If NULL, no subsetting will be performed. Default NULL.
cellIx

Integer vector. Select cells for display in heatmap. If NULL, no subsetting will be performed. Default NULL.
clusterFeature

Logical. Determines whether rows should be clustered. Default TRUE.
clusterCell

Logical. Determines whether columns should be clustered. Default TRUE.
colorScheme

Character. One of "divergent" or "sequential". A "divergent" scheme is best for highlighting relative data (denoted by 'colorSchemeCenter') such as gene expression data that has been normalized and centered. A "sequential" scheme is best for highlighting data that are ordered low to high such as raw counts or probabilities. Default "divergent".
colorSchemeSymmetric

Logical. When the colorScheme is "divergent" and the data contains both positive and negative numbers, TRUE indicates that the color scheme should be symmetric from [-max(abs(data)), max(abs(data))]. For example, if the data ranges goes from -1.5 to 2, then setting this to TRUE will force the color scheme to range from -2 to 2. Default TRUE.
colorSchemeCenter

Numeric. Indicates the center of a "divergent" colorScheme. Default 0.
col

Color for the heatmap.
annotationCell

Data frame. Additional annotations for each cell will be shown in the column color bars. The format of the data frame should be one row for each cell and one column for each annotation. Numeric variables will be displayed as continuous color bars and factors will be displayed as discrete color bars. Default NULL.
annotationFeature

A data frame for the feature annotations (rows).
annotationColor

List. Contains color scheme for all annotations. See '?pheatmap' for more details.
breaks

Numeric vector. A sequence of numbers that covers the range of values in the normalized 'counts'. Values in the normalized 'matrix' are assigned to each bin in 'breaks'. Each break is assigned to a unique color from 'col'. If NULL, then breaks are calculated automatically. Default NULL.
legend

Logical. Determines whether legend should be drawn. Default TRUE.
annotationLegend

Logical. Whether legend for all annotations should be drawn. Default TRUE.
annotationNamesFeature

Logical. Whether the names for features should be shown. Default TRUE.
annotationNamesCell

Logical. Whether the names for cells should be shown. Default TRUE.
showNamesFeature

Logical. Specifies if feature names should be shown. Default TRUE.
showNamesCell

Logical. Specifies if cell names should be shown. Default FALSE.
rowGroupOrder

Vector. Specifies the order of feature clusters when semisupervised clustering is performed on the y labels.
colGroupOrder

Vector. Specifies the order of cell clusters when semisupervised clustering is performed on the z labels.
hclustMethod

Character. Specifies the method to use for the 'hclust' function. See '?hclust' for possible values. Default "ward.D2".
treeheightFeature

Numeric. Width of the feature dendrogram. Set to 0 to disable plotting of this dendrogram. Default: if clusterFeature == TRUE, then treeheightFeature = 50, else treeheightFeature = 0.
treeheightCell

Numeric. Height of the cell dendrogram. Set to 0 to disable plotting of this dendrogram. Default: if clusterCell == TRUE, then treeheightCell = 50, else treeheightCell = 0.
silent

Logical. Whether to plot the heatmap.
...

Other arguments to be passed to underlying pheatmap function.

Value

list A list containing dendrogram information and the heatmap grob

Examples

data(celdaCGSim, celdaCGMod)
plotHeatmap(celdaCGSim$counts,
  z = celdaClusters(celdaCGMod)$z, y = celdaClusters(celdaCGMod)$y
)

Visualize perplexity differences of a list of celda models

Description

Visualize perplexity differences of every model in a celdaList, by unique K/L combinations.

Usage

plotRPC(x, altExpName = "featureSubset", sep = 5, alpha = 0.5)

## S4 method for signature 'SingleCellExperiment'
plotRPC(x, altExpName = "featureSubset", sep = 5, alpha = 0.5)

## S4 method for signature 'celdaList'
plotRPC(x, sep = 5, alpha = 0.5)

Arguments

x

Can be one of

  • A SingleCellExperiment object returned from celdaGridSearch, recursiveSplitModule, or recursiveSplitCell. Must contain a list named "celda_grid_search" in metadata(x).

  • celdaList object.
altExpName

The name for the altExp slot to use. Default "featureSubset".
sep

Numeric. Breaks in the x axis of the resulting plot.
alpha

Numeric. Passed to geom_jitter. Opacity of the points. Values of alpha range from 0 to 1, with lower values corresponding to more transparent colors.

Value

A ggplot plot object showing perplexity differences as a function of clustering parameters.

Examples

data(sceCeldaCGGridSearch)
sce <- resamplePerplexity(sceCeldaCGGridSearch)
plotRPC(sce)
data(celdaCGSim, celdaCGGridSearchRes)
## Run various combinations of parameters with 'celdaGridSearch'
celdaCGGridSearchRes <- resamplePerplexity(
  celdaCGSim$counts,
  celdaCGGridSearchRes)
plotRPC(celdaCGGridSearchRes)

Recode feature module labels

Description

Recode feature module clusters using a mapping in the from and to arguments.

Usage

recodeClusterY(sce, from, to, altExpName = "featureSubset")

Arguments

sce

SingleCellExperiment object returned from celda_G or celda_CG. Must contain column celda_feature_module in rowData(altExp(sce, altExpName)).
from

Numeric vector. Unique values in the range of seq(celdaModules(sce)) that correspond to the original module labels in sce.
to

Numeric vector. Unique values in the range of seq(celdaModules(sce)) that correspond to the new module labels.
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

@return SingleCellExperiment object with recoded feature module labels.

Examples

data(sceCeldaCG)
sceReorderedY <- recodeClusterY(sceCeldaCG, c(1, 3), c(3, 1))

Recode cell cluster labels

Description

Recode cell subpopulaton clusters using a mapping in the from and to arguments.

Usage

recodeClusterZ(sce, from, to, altExpName = "featureSubset")

Arguments

sce

SingleCellExperiment object returned from celda_C or celda_CG. Must contain column celda_cell_cluster in colData(altExp(sce, altExpName)).
from

Numeric vector. Unique values in the range of seq(max(as.integer(celdaClusters(sce, altExpName = altExpName)))) that correspond to the original cluster labels in sce.
to

Numeric vector. Unique values in the range of seq(max(as.integer(celdaClusters(sce, altExpName = altExpName)))) that correspond to the new cluster labels.
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

SingleCellExperiment object with recoded cell cluster labels.

Examples

data(sceCeldaCG)
sceReorderedZ <- recodeClusterZ(sceCeldaCG, c(1, 3), c(3, 1))

Recursive cell splitting

Description

Uses the celda_C model to cluster cells into population for range of possible K's. The cell population labels of the previous "K-1" model are used as the initial values in the current model with K cell populations. The best split of an existing cell population is found to create the K-th cluster. This procedure is much faster than randomly initializing each model with a different K. If module labels for each feature are given in 'yInit', the celda_CG model will be used to split cell populations based on those modules instead of individual features. Module labels will also be updated during sampling and thus may end up slightly different than yInit.

Usage

recursiveSplitCell(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  initialK = 5,
  maxK = 25,
  tempL = NULL,
  yInit = NULL,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  minCell = 3,
  reorder = TRUE,
  seed = 12345,
  perplexity = TRUE,
  doResampling = FALSE,
  numResample = 5,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'SingleCellExperiment'
recursiveSplitCell(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  initialK = 5,
  maxK = 25,
  tempL = NULL,
  yInit = NULL,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  minCell = 3,
  reorder = TRUE,
  seed = 12345,
  perplexity = TRUE,
  doResampling = FALSE,
  numResample = 5,
  logfile = NULL,
  verbose = TRUE
)

## S4 method for signature 'matrix'
recursiveSplitCell(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  sampleLabel = NULL,
  initialK = 5,
  maxK = 25,
  tempL = NULL,
  yInit = NULL,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  minCell = 3,
  reorder = TRUE,
  seed = 12345,
  perplexity = TRUE,
  doResampling = FALSE,
  numResample = 5,
  logfile = NULL,
  verbose = TRUE
)

Arguments

x

A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
useAssay

A string specifying the name of the assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
sampleLabel

Vector or factor. Denotes the sample label for each cell (column) in the count matrix.
initialK

Integer. Initial number of cell populations to try. Default 5.
maxK

Integer. Maximum number of cell populations to try. Default 25.
tempL

Integer. Number of temporary modules to identify and use in cell splitting. Only used if yInit = NULL. Collapsing features to a relatively smaller number of modules will increase the speed of clustering and tend to produce better cell populations. This number should be larger than the number of true modules expected in the dataset. Default NULL.
yInit

Integer vector. Module labels for features. Cells will be clustered using the celda_CG model based on the modules specified in yInit rather than the counts of individual features. While the features will be initialized to the module labels in yInit, the labels will be allowed to move within each new model with a different K.
alpha

Numeric. Concentration parameter for Theta. Adds a pseudocount to each cell population in each sample. Default 1.
beta

Numeric. Concentration parameter for Phi. Adds a pseudocount to each feature in each cell (if yInit is NULL) or to each module in each cell population (if yInit is set). Default 1.
delta

Numeric. Concentration parameter for Psi. Adds a pseudocount to each feature in each module. Only used if yInit is set. Default 1.
gamma

Numeric. Concentration parameter for Eta. Adds a pseudocount to the number of features in each module. Only used if yInit is set. Default 1.
minCell

Integer. Only attempt to split cell populations with at least this many cells.
reorder

Logical. Whether to reorder cell populations using hierarchical clustering after each model has been created. If FALSE, cell populations numbers will correspond to the split which created the cell populations (i.e. 'K15' was created at split 15, 'K16' was created at split 16, etc.). Default TRUE.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.
perplexity

Logical. Whether to calculate perplexity for each model. If FALSE, then perplexity can be calculated later with resamplePerplexity. Default TRUE.
doResampling

Boolean. If TRUE, then each cell in the counts matrix will be resampled according to a multinomial distribution to introduce noise before calculating perplexity. Default FALSE.
numResample

Integer. The number of times to resample the counts matrix for evaluating perplexity if doResampling is set to TRUE. Default 5.
logfile

Character. Messages will be redirected to a file named "logfile". If NULL, messages will be printed to stdout. Default NULL.
verbose

Logical. Whether to print log messages. Default TRUE.

Value

A SingleCellExperiment object. Function parameter settings and celda model results are stored in the metadata "celda_grid_search" slot. The models in the list will be of class celda_C if yInit = NULL or celda_CG if zInit is set.

See Also

recursiveSplitModule for recursive splitting of feature modules.

Examples

data(sceCeldaCG)
## Create models that range from K = 3 to K = 7 by recursively splitting
## cell populations into two to produce \link{celda_C} cell clustering models
sce <- recursiveSplitCell(sceCeldaCG, initialK = 3, maxK = 7)

## Alternatively, first identify features modules using
## \link{recursiveSplitModule}
moduleSplit <- recursiveSplitModule(sceCeldaCG, initialL = 3, maxL = 15)
plotGridSearchPerplexity(moduleSplit)
moduleSplitSelect <- subsetCeldaList(moduleSplit, list(L = 10))

## Then use module labels for initialization in \link{recursiveSplitCell} to
## produce \link{celda_CG} bi-clustering models
cellSplit <- recursiveSplitCell(sceCeldaCG,
  initialK = 3, maxK = 7, yInit = celdaModules(moduleSplitSelect))
plotGridSearchPerplexity(cellSplit)
sce <- subsetCeldaList(cellSplit, list(K = 5, L = 10))
data(celdaCGSim, celdaCSim)
## Create models that range from K = 3 to K = 7 by recursively splitting
## cell populations into two to produce \link{celda_C} cell clustering models
sce <- recursiveSplitCell(celdaCSim$counts, initialK = 3, maxK = 7)

## Alternatively, first identify features modules using
## \link{recursiveSplitModule}
moduleSplit <- recursiveSplitModule(celdaCGSim$counts,
  initialL = 3, maxL = 15)
plotGridSearchPerplexity(moduleSplit)
moduleSplitSelect <- subsetCeldaList(moduleSplit, list(L = 10))

## Then use module labels for initialization in \link{recursiveSplitCell} to
## produce \link{celda_CG} bi-clustering models
cellSplit <- recursiveSplitCell(celdaCGSim$counts,
  initialK = 3, maxK = 7, yInit = celdaModules(moduleSplitSelect))
plotGridSearchPerplexity(cellSplit)
sce <- subsetCeldaList(cellSplit, list(K = 5, L = 10))

Recursive module splitting

Description

Uses the celda_G model to cluster features into modules for a range of possible L's. The module labels of the previous "L-1" model are used as the initial values in the current model with L modules. The best split of an existing module is found to create the L-th module. This procedure is much faster than randomly initializing each model with a different L.

Usage

recursiveSplitModule(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  initialL = 10,
  maxL = 100,
  tempK = 100,
  zInit = NULL,
  sampleLabel = NULL,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  minFeature = 3,
  reorder = TRUE,
  seed = 12345,
  perplexity = TRUE,
  doResampling = FALSE,
  numResample = 5,
  verbose = TRUE,
  logfile = NULL
)

## S4 method for signature 'SingleCellExperiment'
recursiveSplitModule(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  initialL = 10,
  maxL = 100,
  tempK = 100,
  zInit = NULL,
  sampleLabel = NULL,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  minFeature = 3,
  reorder = TRUE,
  seed = 12345,
  perplexity = TRUE,
  doResampling = FALSE,
  numResample = 5,
  verbose = TRUE,
  logfile = NULL
)

## S4 method for signature 'matrix'
recursiveSplitModule(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  initialL = 10,
  maxL = 100,
  tempK = 100,
  zInit = NULL,
  sampleLabel = NULL,
  alpha = 1,
  beta = 1,
  delta = 1,
  gamma = 1,
  minFeature = 3,
  reorder = TRUE,
  seed = 12345,
  perplexity = TRUE,
  doResampling = FALSE,
  numResample = 5,
  verbose = TRUE,
  logfile = NULL
)

Arguments

x

A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
initialL

Integer. Initial number of modules.
maxL

Integer. Maximum number of modules.
tempK

Integer. Number of temporary cell populations to identify and use in module splitting. Only used if zInit = NULL Collapsing cells to a relatively smaller number of cell popluations will increase the speed of module clustering and tend to produce better modules. This number should be larger than the number of true cell populations expected in the dataset. Default 100.
zInit

Integer vector. Collapse cells to cell populations based on labels in zInit and then perform module splitting. If NULL, no collapsing will be performed unless tempK is specified. Default NULL.
sampleLabel

Vector or factor. Denotes the sample label for each cell (column) in the count matrix. Default NULL.
alpha

Numeric. Concentration parameter for Theta. Adds a pseudocount to each cell population in each sample. Only used if zInit is set. Default 1.
beta

Numeric. Concentration parameter for Phi. Adds a pseudocount to each feature module in each cell. Default 1.
delta

Numeric. Concentration parameter for Psi. Adds a pseudocount to each feature in each module. Default 1.
gamma

Numeric. Concentration parameter for Eta. Adds a pseudocount to the number of features in each module. Default 1.
minFeature

Integer. Only attempt to split modules with at least this many features.
reorder

Logical. Whether to reorder modules using hierarchical clustering after each model has been created. If FALSE, module numbers will correspond to the split which created the module (i.e. 'L15' was created at split 15, 'L16' was created at split 16, etc.). Default TRUE.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.
perplexity

Logical. Whether to calculate perplexity for each model. If FALSE, then perplexity can be calculated later with resamplePerplexity. Default TRUE.
doResampling

Boolean. If TRUE, then each cell in the counts matrix will be resampled according to a multinomial distribution to introduce noise before calculating perplexity. Default FALSE.
numResample

Integer. The number of times to resample the counts matrix for evaluating perplexity if doResampling is set to TRUE. Default 5.
verbose

Logical. Whether to print log messages. Default TRUE.
logfile

Character. Messages will be redirected to a file named "logfile". If NULL, messages will be printed to stdout. Default NULL.

Value

A SingleCellExperiment object. Function parameter settings and celda model results are stored in the metadata "celda_grid_search" slot. The models in the list will be of class celda_G if zInit = NULL or celda_CG if zInit is set.

See Also

recursiveSplitCell for recursive splitting of cell populations.

Examples

data(sceCeldaCG)
## Create models that range from L=3 to L=20 by recursively splitting modules
## into two
moduleSplit <- recursiveSplitModule(sceCeldaCG, initialL = 3, maxL = 20)

## Example results with perplexity
plotGridSearchPerplexity(moduleSplit)

## Select model for downstream analysis
celdaMod <- subsetCeldaList(moduleSplit, list(L = 10))
data(celdaCGSim)
## Create models that range from L=3 to L=20 by recursively splitting modules
## into two
moduleSplit <- recursiveSplitModule(celdaCGSim$counts,
  initialL = 3, maxL = 20)

## Example results with perplexity
plotGridSearchPerplexity(moduleSplit)

## Select model for downstream analysis
celdaMod <- subsetCeldaList(moduleSplit, list(L = 10))

Reorder cells populations and/or features modules using hierarchical clustering

Description

Apply hierarchical clustering to reorder the cell populations and/or feature modules and group similar ones together based on the cosine distance of the factorized matrix from factorizeMatrix.

Usage

reorderCelda(
  x,
  celdaMod,
  useAssay = "counts",
  altExpName = "featureSubset",
  method = "complete"
)

## S4 method for signature 'SingleCellExperiment,ANY'
reorderCelda(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  method = "complete"
)

## S4 method for signature 'matrix,celda_CG'
reorderCelda(x, celdaMod, method = "complete")

## S4 method for signature 'matrix,celda_C'
reorderCelda(x, celdaMod, method = "complete")

## S4 method for signature 'matrix,celda_G'
reorderCelda(x, celdaMod, method = "complete")

Arguments

x

Can be one of

  • A SingleCellExperiment object returned by celda_C, celda_G or celda_CG, with the matrix located in the useAssay assay slot in altExp(x, altExpName). Rows represent features and columns represent cells.

  • Integer count matrix. Rows represent features and columns represent cells. This matrix should be the same as the one used to generate celdaMod.
celdaMod

Celda model object. Only works if x is an integer counts matrix. Ignored if x is a SingleCellExperiment object.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot. Default "featureSubset".
method

Passed to hclust. The agglomeration method to be used to be used. Default "complete".

Value

A SingleCellExperiment object (or Celda model object) with updated cell cluster and/or feature module labels.

Examples

data(sceCeldaCG)
reordersce <- reorderCelda(sceCeldaCG)
data(celdaCGSim, celdaCGMod)
reorderCeldaCG <- reorderCelda(celdaCGSim$counts, celdaCGMod)
data(celdaCSim, celdaCMod)
reorderCeldaC <- reorderCelda(celdaCSim$counts, celdaCMod)
data(celdaGSim, celdaGMod)
reorderCeldaG <- reorderCelda(celdaGSim$counts, celdaGMod)

Generate an HTML report for celda_CG

Description

reportCeldaCGRun will run recursiveSplitModule and recursiveSplitCell to find the number of modules (L) and the number of cell populations (K). A final celda_CG model will be selected from recursiveSplitCell. After a celda_CG model has been fit, reportCeldaCGPlotResults can be used to create an HTML report for visualization and exploration of the celda_CG model results. Some of the plotting and feature selection functions require the installation of the Bioconductor package singleCellTK.

Usage

reportCeldaCGRun(
  sce,
  L,
  K,
  sampleLabel = NULL,
  altExpName = "featureSubset",
  useAssay = "counts",
  initialL = 10,
  maxL = 150,
  initialK = 5,
  maxK = 50,
  minCell = 3,
  minCount = 3,
  maxFeatures = 5000,
  output_file = "CeldaCG_RunReport",
  output_sce_prefix = "celda_cg",
  output_dir = ".",
  pdf = FALSE,
  showSession = TRUE
)

reportCeldaCGPlotResults(
  sce,
  reducedDimName,
  features = NULL,
  displayName = NULL,
  altExpName = "featureSubset",
  useAssay = "counts",
  cellAnnot = NULL,
  cellAnnotLabel = NULL,
  exactMatch = TRUE,
  moduleFilePrefix = "module_features",
  output_file = "CeldaCG_ResultReport",
  output_dir = ".",
  pdf = FALSE,
  showSetup = TRUE,
  showSession = TRUE
)

Arguments

sce

A SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
L

Integer. Final number of feature modules. See celda_CG for more information.
K

Integer. Final number of cell populations. See celda_CG for more information.
sampleLabel

Vector or factor. Denotes the sample label for each cell (column) in the count matrix.
altExpName

The name for the altExp slot to use. Default "featureSubset".
useAssay

A string specifying which assay slot to use. Default "counts".
initialL

Integer. Minimum number of modules to try. See recursiveSplitModule for more information. Defailt 10.
maxL

Integer. Maximum number of modules to try. See recursiveSplitModule for more information. Default 150.
initialK

Integer. Initial number of cell populations to try.
maxK

Integer. Maximum number of cell populations to try.
minCell

Integer. Minimum number of cells required for feature selection. See selectFeatures for more information. Default 3.
minCount

Integer. Minimum number of counts required for feature selection. See selectFeatures for more information. Default 3.
maxFeatures

Integer. Maximum number of features to include. If the number of features after filtering for minCell and minCount are greater than maxFeature, then Seurat's VST function is used to select the top variable features. Default 5000.
output_file

Character. Prefix of the html file. Default "CeldaCG_ResultReport".
output_sce_prefix

Character. The sce object with celda_CG results will be saved to an .rds file starting with this prefix. Default celda_cg.
output_dir

Character. Path to save the html file. Default ..
pdf

Boolean. Whether to create PDF versions of each plot in addition to PNGs. Default FALSE.
showSession

Boolean. Whether to show the session information at the end. Default TRUE.
reducedDimName

Character. Name of the reduced dimensional object to be used in 2-D scatter plots throughout the report. Default celda_UMAP.
features

Character vector. Expression of these features will be displayed on a reduced dimensional plot defined by reducedDimName. If NULL, then no plotting of features on a reduced dimensinoal plot will be performed. Default NULL.
displayName

Character. The name to use for display in scatter plots and heatmaps. If NULL, then the rownames of the sce object will be used. This can also be set to the name of a column in the row data of sce or altExp(sce, altExpName). Default NULL.
cellAnnot

Character vector. The cell-level annotations to display on the reduced dimensional plot. These variables should be present in the column data of the sce object. Default NULL.
cellAnnotLabel

Character vector. Additional cell-level annotations to display on the reduced dimensional plot. Variables will be treated as categorial and labels for each group will be placed on the plot. These variables should be present in the column data of the sce object. Default NULL.
exactMatch

Boolean. Whether to only identify exact matches or to identify partial matches using grep. Default FALSE.
moduleFilePrefix

Character. The features in each module will be written to a a csv file starting with this name. If NULL, then no file will be written. Default "module_features".
showSetup

Boolean. Whether to show the setup code at the beginning. Default TRUE.

Value

.html file

Examples

data(sceCeldaCG)
## Not run: 
library(SingleCellExperiment)
sceCeldaCG$sum <- colSums(counts(sceCeldaCG))
rowData(sceCeldaCG)$rownames <- rownames(sceCeldaCG)
sceCeldaCG <- reportCeldaCGRun(sceCeldaCG,
    initialL = 5, maxL = 20, initialK = 5,
    maxK = 20, L = 10, K = 5)
reportCeldaCGPlotResults(sce = sceCeldaCG,
    reducedDimName = "celda_UMAP",
    features = c("Gene_1", "Gene_100"),
    displayName = "rownames",
    cellAnnot="sum")

## End(Not run)

Calculate and visualize perplexity of all models in a celdaList

Description

Calculates the perplexity of each model's cluster assignments given the provided countMatrix, as well as resamplings of that count matrix, providing a distribution of perplexities and a better sense of the quality of a given K/L choice.

Usage

resamplePerplexity(
  x,
  celdaList,
  useAssay = "counts",
  altExpName = "featureSubset",
  doResampling = FALSE,
  numResample = 5,
  seed = 12345
)

## S4 method for signature 'SingleCellExperiment'
resamplePerplexity(
  x,
  useAssay = "counts",
  altExpName = "featureSubset",
  doResampling = FALSE,
  numResample = 5,
  seed = 12345
)

## S4 method for signature 'ANY'
resamplePerplexity(
  x,
  celdaList,
  doResampling = FALSE,
  numResample = 5,
  seed = 12345
)

Arguments

x

A numeric matrix of counts or a SingleCellExperiment returned from celdaGridSearch with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells. Must contain "celda_grid_search" slot in metadata(x) if x is a SingleCellExperiment object.
celdaList

Object of class 'celdaList'. Used only if x is a matrix object.
useAssay

A string specifying which assay slot to use if x is a SingleCellExperiment object. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
doResampling

Boolean. If TRUE, then each cell in the counts matrix will be resampled according to a multinomial distribution to introduce noise before calculating perplexity. Default FALSE.
numResample

Integer. The number of times to resample the counts matrix for evaluating perplexity if doResampling is set to TRUE. Default 5.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.

Value

A SingleCellExperiment object or celdaList object with a perplexity property, detailing the perplexity of all K/L combinations that appeared in the celdaList's models.

Examples

data(sceCeldaCGGridSearch)
sce <- resamplePerplexity(sceCeldaCGGridSearch)
plotGridSearchPerplexity(sce)
data(celdaCGSim, celdaCGGridSearchRes)
celdaCGGridSearchRes <- resamplePerplexity(
  celdaCGSim$counts,
  celdaCGGridSearchRes
)
plotGridSearchPerplexity(celdaCGGridSearchRes)

Get final celdaModels from a celda model SCE or celdaList object

Description

Returns all celda models generated during a celdaGridSearch run.

Usage

resList(x, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
resList(x, altExpName = "featureSubset")

## S4 method for signature 'celdaList'
resList(x)

Arguments

x

An object of class SingleCellExperiment or celdaList.
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

List. Contains one celdaModel object for each of the parameters specified in runParams(x).

Examples

data(sceCeldaCGGridSearch)
celdaCGGridModels <- resList(sceCeldaCGGridSearch)
data(celdaCGGridSearchRes)
celdaCGGridModels <- resList(celdaCGGridSearchRes)

Retrieve row index for a set of features

Description

This will return indices of features among the rownames or rowData of a data.frame, matrix, or a SummarizedExperiment object including a SingleCellExperiment. Partial matching (i.e. grepping) can be used by setting exactMatch = FALSE.

Usage

retrieveFeatureIndex(
  features,
  x,
  by = "rownames",
  exactMatch = TRUE,
  removeNA = FALSE
)

Arguments

features

Character vector of feature names to find in the rows of x.
x

A data.frame, matrix, or SingleCellExperiment object to search.
by

Character. Where to search for features in x. If set to "rownames" then the features will be searched for among rownames(x). If x inherits from class SummarizedExperiment, then by can be one of the fields in the row annotation data.frame (i.e. one of colnames(rowData(x))).
exactMatch

Boolean. Whether to only identify exact matches or to identify partial matches using grep.
removeNA

Boolean. If set to FALSE, features not found in x will be given NA and the returned vector will be the same length as features. If set to TRUE, then the NA values will be removed from the returned vector. Default FALSE.

Value

A vector of row indices for the matching features in x.

Author(s)

Yusuke Koga, Joshua Campbell

See Also

'retrieveFeatureInfo' from package 'scater' and link{regex} for how to use regular expressions when exactMatch = FALSE.

Examples

data(celdaCGSim)
retrieveFeatureIndex(c("Gene_1", "Gene_5"), celdaCGSim$counts)
retrieveFeatureIndex(c("Gene_1", "Gene_5"), celdaCGSim$counts,
                                            exactMatch = FALSE)

Get run parameters from a celda model SingleCellExperiment or celdaList object

Description

Returns details on the clustering parameters and model priors from the celdaList object when it was created.

Usage

runParams(x, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
runParams(x, altExpName = "featureSubset")

## S4 method for signature 'celdaList'
runParams(x)

Arguments

x

An object of class SingleCellExperiment or class celdaList.
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

Data Frame. Contains details on the various K/L parameters, chain parameters, seed, and final log-likelihoods derived for each model in the provided celdaList.

Examples

data(sceCeldaCGGridSearch)
runParams(sceCeldaCGGridSearch)
data(celdaCGGridSearchRes)
runParams(celdaCGGridSearchRes)

sampleCells

Description

A matrix of simulated gene counts.

Usage

sampleCells

Format

A matrix of simulated gene counts with 10 rows (genes) and 10 columns (cells).

Details

A toy count matrix for use with celda.

Generated by Josh Campbell.

Source

http://github.com/campbio/celda

Get or set sample labels from a celda SingleCellExperiment object

Description

Return or set the sample labels for the cells in sce.

Usage

sampleLabel(x, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
sampleLabel(x, altExpName = "featureSubset")

sampleLabel(x, altExpName = "featureSubset") <- value

## S4 replacement method for signature 'SingleCellExperiment'
sampleLabel(x, altExpName = "featureSubset") <- value

## S4 method for signature 'celdaModel'
sampleLabel(x)

Arguments

x

Can be one of

altExpName

The name for the altExp slot to use. Default "featureSubset".
value

Character vector of sample labels for replacements. Works only is x is a SingleCellExperiment object.

Value

Character vector. Contains the sample labels provided at model creation, or those automatically generated by celda.

Examples

data(sceCeldaCG)
sampleLabel(sceCeldaCG)
data(celdaCGMod)
sampleLabel(celdaCGMod)

sceCeldaC

Description

A SingleCellExperiment object containing the results of running selectFeatures and celda_C on celdaCSim.

Usage

sceCeldaC

Format

A SingleCellExperiment object

Examples

data(celdaCSim)
sceCeldaC <- selectFeatures(celdaCSim$counts)
sceCeldaC <- celda_C(sceCeldaC,
    K = celdaCSim$K,
    sampleLabel = celdaCSim$sampleLabel,
    nchains = 1)

sceCeldaCG

Description

A SingleCellExperiment object containing the results of running selectFeatures and celda_CG on celdaCGSim.

Usage

sceCeldaCG

Format

A SingleCellExperiment object

Examples

data(celdaCGSim)
sceCeldaCG <- selectFeatures(celdaCGSim$counts)
sceCeldaCG <- celda_CG(sceCeldaCG,
    K = celdaCGSim$K,
    L = celdaCGSim$L,
    sampleLabel = celdaCGSim$sampleLabel,
    nchains = 1)

sceCeldaCGGridSearch

Description

A SingleCellExperiment object containing the results of running selectFeatures and celdaGridSearch on celdaCGSim.

Usage

sceCeldaCGGridSearch

Format

A SingleCellExperiment object

Examples

data(celdaCGSim)
sce <- selectFeatures(celdaCGSim$counts)
sceCeldaCGGridSearch <- celdaGridSearch(sce,
    model = "celda_CG",
    paramsTest = list(K = seq(4, 6), L = seq(9, 11)),
    paramsFixed = list(sampleLabel = celdaCGSim$sampleLabel),
    bestOnly = TRUE,
    nchains = 1,
    cores = 1,
    verbose = FALSE)

sceCeldaG

Description

A SingleCellExperiment object containing the results of running selectFeatures and celda_G on celdaGSim.

Usage

sceCeldaG

Format

A SingleCellExperiment object

Examples

data(celdaGSim)
sceCeldaG <- selectFeatures(celdaGSim$counts)
sceCeldaG <- celda_G(sceCeldaG, L = celdaGSim$L, nchains = 1)

Select best chain within each combination of parameters

Description

Select the chain with the best log likelihood for each combination of tested parameters from a SCE object gererated by celdaGridSearch or from a celdaList object.

Usage

selectBestModel(x, asList = FALSE, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
selectBestModel(x, asList = FALSE, altExpName = "featureSubset")

## S4 method for signature 'celdaList'
selectBestModel(x, asList = FALSE)

Arguments

x

Can be one of

  • A SingleCellExperiment object returned from celdaGridSearch, recursiveSplitModule, or recursiveSplitCell. Must contain a list named "celda_grid_search" in metadata(x).

  • celdaList object.
asList

TRUE or FALSE. Whether to return the best model as a celdaList object or not. If FALSE, return the best model as a corresponding celda model object.
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

One of

  • A new SingleCellExperiment object containing one model with the best log-likelihood for each set of parameters in metadata(x). If there is only one set of parameters, a new SingleCellExperiment object with the matching model stored in the metadata "celda_parameters" slot will be returned. Otherwise, a new SingleCellExperiment object with the subset models stored in the metadata "celda_grid_search" slot will be returned.

  • A new celdaList object containing one model with the best log-likelihood for each set of parameters. If only one set of parameters is in the celdaList, the best model will be returned directly instead of a celdaList object.

See Also

celdaGridSearch subsetCeldaList

Examples

data(sceCeldaCGGridSearch)
## Returns same result as running celdaGridSearch with "bestOnly = TRUE"
sce <- selectBestModel(sceCeldaCGGridSearch)
data(celdaCGGridSearchRes)
## Returns same result as running celdaGridSearch with "bestOnly = TRUE"
cgsBest <- selectBestModel(celdaCGGridSearchRes)

Simple feature selection by feature counts

Description

A simple heuristic feature selection procedure. Select features with at least minCount counts in at least minCell cells. A SingleCellExperiment object with subset features will be stored in the altExp slot with name altExpName. The name of the assay slot in altExp will be the same as useAssay.

Usage

selectFeatures(
  x,
  minCount = 3,
  minCell = 3,
  useAssay = "counts",
  altExpName = "featureSubset"
)

## S4 method for signature 'SingleCellExperiment'
selectFeatures(
  x,
  minCount = 3,
  minCell = 3,
  useAssay = "counts",
  altExpName = "featureSubset"
)

## S4 method for signature 'matrix'
selectFeatures(
  x,
  minCount = 3,
  minCell = 3,
  useAssay = "counts",
  altExpName = "featureSubset"
)

Arguments

x

A numeric matrix of counts or a SingleCellExperiment with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
minCount

Minimum number of counts required for feature selection.
minCell

Minimum number of cells required for feature selection.
useAssay

A string specifying the name of the assay slot to use. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

A SingleCellExperiment object with a altExpName altExp slot. Function parameter settings are stored in the metadata "select_features" slot.

Examples

data(sceCeldaCG)
sce <- selectFeatures(sceCeldaCG)
data(celdaCGSim)
sce <- selectFeatures(celdaCGSim$counts)

A function to draw clustered heatmaps.

Description

A function to draw clustered heatmaps where one has better control over some graphical parameters such as cell size, etc.

The function also allows to aggregate the rows using kmeans clustering. This is advisable if number of rows is so big that R cannot handle their hierarchical clustering anymore, roughly more than 1000. Instead of showing all the rows separately one can cluster the rows in advance and show only the cluster centers. The number of clusters can be tuned with parameter kmeansK.

Usage

semiPheatmap(
  mat,
  color = colorRampPalette(rev(brewer.pal(n = 7, name = "RdYlBu")))(100),
  kmeansK = NA,
  breaks = NA,
  borderColor = "grey60",
  cellWidth = NA,
  cellHeight = NA,
  scale = "none",
  clusterRows = TRUE,
  clusterCols = TRUE,
  clusteringDistanceRows = "euclidean",
  clusteringDistanceCols = "euclidean",
  clusteringMethod = "complete",
  clusteringCallback = .identity2,
  cutreeRows = NA,
  cutreeCols = NA,
  treeHeightRow = ifelse(clusterRows, 50, 0),
  treeHeightCol = ifelse(clusterCols, 50, 0),
  legend = TRUE,
  legendBreaks = NA,
  legendLabels = NA,
  annotationRow = NA,
  annotationCol = NA,
  annotation = NA,
  annotationColors = NA,
  annotationLegend = TRUE,
  annotationNamesRow = TRUE,
  annotationNamesCol = TRUE,
  dropLevels = TRUE,
  showRownames = TRUE,
  showColnames = TRUE,
  main = NA,
  fontSize = 10,
  fontSizeRow = fontSize,
  fontSizeCol = fontSize,
  displayNumbers = FALSE,
  numberFormat = "%.2f",
  numberColor = "grey30",
  fontSizeNumber = 0.8 * fontSize,
  gapsRow = NULL,
  gapsCol = NULL,
  labelsRow = NULL,
  labelsCol = NULL,
  fileName = NA,
  width = NA,
  height = NA,
  silent = FALSE,
  rowLabel,
  colLabel,
  rowGroupOrder = NULL,
  colGroupOrder = NULL,
  ...
)

Arguments

mat

numeric matrix of the values to be plotted.
color

vector of colors used in heatmap.
kmeansK

the number of kmeans clusters to make, if we want to agggregate the rows before drawing heatmap. If NA then the rows are not aggregated.
breaks

Numeric vector. A sequence of numbers that covers the range of values in the normalized 'counts'. Values in the normalized 'matrix' are assigned to each bin in 'breaks'. Each break is assigned to a unique color from 'col'. If NULL, then breaks are calculated automatically. Default NULL.
borderColor

color of cell borders on heatmap, use NA if no border should be drawn.
cellWidth

individual cell width in points. If left as NA, then the values depend on the size of plotting window.
cellHeight

individual cell height in points. If left as NA, then the values depend on the size of plotting window.
scale

character indicating if the values should be centered and scaled in either the row direction or the column direction, or none. Corresponding values are "row", "column" and "none".
clusterRows

boolean values determining if rows should be clustered or hclust object,
clusterCols

boolean values determining if columns should be clustered or hclust object.
clusteringDistanceRows

distance measure used in clustering rows. Possible values are "correlation" for Pearson correlation and all the distances supported by dist, such as "euclidean", etc. If the value is none of the above it is assumed that a distance matrix is provided.
clusteringDistanceCols

distance measure used in clustering columns. Possible values the same as for clusteringDistanceRows.
clusteringMethod

clustering method used. Accepts the same values as hclust.
clusteringCallback

callback function to modify the clustering. Is called with two parameters: original hclust object and the matrix used for clustering. Must return a hclust object.
cutreeRows

number of clusters the rows are divided into, based on the hierarchical clustering (using cutree), if rows are not clustered, the argument is ignored
cutreeCols

similar to cutreeRows, but for columns
treeHeightRow

the height of a tree for rows, if these are clustered. Default value 50 points.
treeHeightCol

the height of a tree for columns, if these are clustered. Default value 50 points.
legend

logical to determine if legend should be drawn or not.
legendBreaks

vector of breakpoints for the legend.
legendLabels

vector of labels for the legendBreaks.
annotationRow

data frame that specifies the annotations shown on left side of the heatmap. Each row defines the features for a specific row. The rows in the data and in the annotation are matched using corresponding row names. Note that color schemes takes into account if variable is continuous or discrete.
annotationCol

similar to annotationRow, but for columns.
annotation

deprecated parameter that currently sets the annotationCol if it is missing.
annotationColors

list for specifying annotationRow and annotationCol track colors manually. It is possible to define the colors for only some of the features. Check examples for details.
annotationLegend

boolean value showing if the legend for annotation tracks should be drawn.
annotationNamesRow

boolean value showing if the names for row annotation tracks should be drawn.
annotationNamesCol

boolean value showing if the names for column annotation tracks should be drawn.
dropLevels

logical to determine if unused levels are also shown in the legend.
showRownames

boolean specifying if column names are be shown.
showColnames

boolean specifying if column names are be shown.
main

the title of the plot
fontSize

base fontsize for the plot
fontSizeRow

fontsize for rownames (Default: fontsize)
fontSizeCol

fontsize for colnames (Default: fontsize)
displayNumbers

logical determining if the numeric values are also printed to the cells. If this is a matrix (with same dimensions as original matrix), the contents of the matrix are shown instead of original values.
numberFormat

format strings (C printf style) of the numbers shown in cells. For example "%.2f" shows 2 decimal places and "%.1e" shows exponential notation (see more in sprintf).
numberColor

color of the text
fontSizeNumber

fontsize of the numbers displayed in cells
gapsRow

vector of row indices that show shere to put gaps into heatmap. Used only if the rows are not clustered. See cutreeRow to see how to introduce gaps to clustered rows.
gapsCol

similar to gapsRow, but for columns.
labelsRow

custom labels for rows that are used instead of rownames.
labelsCol

similar to labelsRow, but for columns.
fileName

file path where to save the picture. Filetype is decided by the extension in the path. Currently following formats are supported: png, pdf, tiff, bmp, jpeg. Even if the plot does not fit into the plotting window, the file size is calculated so that the plot would fit there, unless specified otherwise.
width

manual option for determining the output file width in inches.
height

manual option for determining the output file height in inches.
silent

do not draw the plot (useful when using the gtable output)
rowLabel

row cluster labels for semi-clustering
colLabel

column cluster labels for semi-clustering
rowGroupOrder

Vector. Specifies the order of feature clusters when semisupervised clustering is performed on the y labels.
colGroupOrder

Vector. Specifies the order of cell clusters when semisupervised clustering is performed on the z labels.
...

graphical parameters for the text used in plot. Parameters passed to grid.text, see gpar.

Value

Invisibly a list of components

  • treeRow the clustering of rows as hclust object

  • treeCol the clustering of columns as hclust object

  • kmeans the kmeans clustering of rows if parameter kmeansK was specified

Author(s)

Raivo Kolde <[email protected]> #@examples # Create test matrix test = matrix(rnorm(200), 20, 10) test[seq(10), seq(1, 10, 2)] = test[seq(10), seq(1, 10, 2)] + 3 test[seq(11, 20), seq(2, 10, 2)] = test[seq(11, 20), seq(2, 10, 2)] + 2 test[seq(15, 20), seq(2, 10, 2)] = test[seq(15, 20), seq(2, 10, 2)] + 4 colnames(test) = paste("Test", seq(10), sep = "") rownames(test) = paste("Gene", seq(20), sep = "")

# Draw heatmaps pheatmap(test) pheatmap(test, kmeansK = 2) pheatmap(test, scale = "row", clusteringDistanceRows = "correlation") pheatmap(test, color = colorRampPalette(c("navy", "white", "firebrick3"))(50)) pheatmap(test, cluster_row = FALSE) pheatmap(test, legend = FALSE)

# Show text within cells pheatmap(test, displayNumbers = TRUE) pheatmap(test, displayNumbers = TRUE, numberFormat = "%.1e") pheatmap(test, displayNumbers = matrix(ifelse(test > 5, "*", ""), nrow(test))) pheatmap(test, cluster_row = FALSE, legendBreaks = seq(-1, 4), legendLabels = c("0", "1e-4", "1e-3", "1e-2", "1e-1", "1"))

# Fix cell sizes and save to file with correct size pheatmap(test, cellWidth = 15, cellHeight = 12, main = "Example heatmap") pheatmap(test, cellWidth = 15, cellHeight = 12, fontSize = 8, fileName = "test.pdf")

# Generate annotations for rows and columns annotationCol = data.frame(CellType = factor(rep(c("CT1", "CT2"), 5)), Time = seq(5)) rownames(annotationCol) = paste("Test", seq(10), sep = "")

annotationRow = data.frame(GeneClass = factor(rep(c("Path1", "Path2", "Path3"), c(10, 4, 6)))) rownames(annotationRow) = paste("Gene", seq(20), sep = "")

# Display row and color annotations pheatmap(test, annotationCol = annotationCol) pheatmap(test, annotationCol = annotationCol, annotationLegend = FALSE) pheatmap(test, annotationCol = annotationCol, annotationRow = annotationRow)

# Specify colors ann_colors = list(Time = c("white", "firebrick"), CellType = c(CT1 = "#1B9E77", CT2 = "#D95F02"), GeneClass = c(Path1 = "#7570B3", Path2 = "#E7298A", Path3 = "#66A61E"))

pheatmap(test, annotationCol = annotationCol, annotationColors = ann_colors, main = "Title") pheatmap(test, annotationCol = annotationCol, annotationRow = annotationRow, annotationColors = ann_colors) pheatmap(test, annotationCol = annotationCol, annotationColors = ann_colors[2])

# Gaps in heatmaps pheatmap(test, annotationCol = annotationCol, clusterRows = FALSE, gapsRow = c(10, 14)) pheatmap(test, annotationCol = annotationCol, clusterRows = FALSE, gapsRow = c(10, 14), cutreeCol = 2)

# Show custom strings as row/col names labelsRow = c("", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "Il10", "Il15", "Il1b")

pheatmap(test, annotationCol = annotationCol, labelsRow = labelsRow)

# Specifying clustering from distance matrix drows = stats::dist(test, method = "minkowski") dcols = stats::dist(t(test), method = "minkowski") pheatmap(test, clusteringDistanceRows = drows, clusteringDistanceCols = dcols)

# Modify ordering of the clusters using clustering callback option callback = function(hc, mat) sv = svd(t(mat))$v[, 1] dend = reorder(as.dendrogram(hc), wts = sv) as.hclust(dend)

pheatmap(test, clusteringCallback = callback)

Simulate count data from the celda generative models.

Description

This function generates a SingleCellExperiment containing a simulated counts matrix in the "counts" assay slot, as well as various parameters used in the simulation which can be useful for running celda and are stored in metadata slot. The user must provide the desired model (one of celda_C, celda_G, celda_CG) as well as any desired tuning parameters for those model's simulation functions as detailed below.

Usage

simulateCells(
  model = c("celda_CG", "celda_C", "celda_G"),
  S = 5,
  CRange = c(50, 100),
  NRange = c(500, 1000),
  C = 100,
  G = 100,
  K = 5,
  L = 10,
  alpha = 1,
  beta = 1,
  gamma = 5,
  delta = 1,
  seed = 12345
)

Arguments

model

Character. Options available in celda::availableModels. Can be one of "celda_CG", "celda_C", or "celda_G". Default "celda_CG".
S

Integer. Number of samples to simulate. Default 5. Only used if model is one of "celda_CG" or "celda_C".
CRange

Integer vector. A vector of length 2 that specifies the lower and upper bounds of the number of cells to be generated in each sample. Default c(50, 100). Only used if model is one of "celda_CG" or "celda_C".
NRange

Integer vector. A vector of length 2 that specifies the lower and upper bounds of the number of counts generated for each cell. Default c(500, 1000).
C

Integer. Number of cells to simulate. Default 100. Only used if model is "celda_G".
G

Integer. The total number of features to be simulated. Default 100.
K

Integer. Number of cell populations. Default 5. Only used if model is one of "celda_CG" or "celda_C".
L

Integer. Number of feature modules. Default 10. Only used if model is one of "celda_CG" or "celda_G".
alpha

Numeric. Concentration parameter for Theta. Adds a pseudocount to each cell population in each sample. Default 1. Only used if model is one of "celda_CG" or "celda_C".
beta

Numeric. Concentration parameter for Phi. Adds a pseudocount to each feature module in each cell population. Default 1.
gamma

Numeric. Concentration parameter for Eta. Adds a pseudocount to the number of features in each module. Default 5. Only used if model is one of "celda_CG" or "celda_G".
delta

Numeric. Concentration parameter for Psi. Adds a pseudocount to each feature in each module. Default 1. Only used if model is one of "celda_CG" or "celda_G".
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.

Value

A SingleCellExperiment object with simulated count matrix stored in the "counts" assay slot. Function parameter settings are stored in the metadata slot. For "celda_CG" and "celda_C" models, columns celda_sample_label and celda_cell_cluster in colData contain simulated sample labels and cell population clusters. For "celda_CG" and "celda_G" models, column celda_feature_module in rowData contains simulated gene modules.

Examples

sce <- simulateCells()

Simulate contaminated count matrix

Description

This function generates a list containing two count matrices – one for real expression, the other one for contamination, as well as other parameters used in the simulation which can be useful for running decontamination.

Usage

simulateContamination(
  C = 300,
  G = 100,
  K = 3,
  NRange = c(500, 1000),
  beta = 0.1,
  delta = c(1, 10),
  numMarkers = 3,
  seed = 12345
)

Arguments

C

Integer. Number of cells to be simulated. Default 300.
G

Integer. Number of genes to be simulated. Default 100.
K

Integer. Number of cell populations to be simulated. Default 3.
NRange

Integer vector. A vector of length 2 that specifies the lower and upper bounds of the number of counts generated for each cell. Default c(500, 1000).
beta

Numeric. Concentration parameter for Phi. Default 0.1.
delta

Numeric or Numeric vector. Concentration parameter for Theta. If input as a single numeric value, symmetric values for beta distribution are specified; if input as a vector of lenght 2, the two values will be the shape1 and shape2 paramters of the beta distribution respectively. Default c(1, 5).
numMarkers

Integer. Number of markers for each cell population. Default 3.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.

Value

A list containing the nativeMatirx (real expression), observedMatrix (real expression + contamination), as well as other parameters used in the simulation.

Author(s)

Shiyi Yang, Yuan Yin, Joshua Campbell

Examples

contaminationSim <- simulateContamination(K = 3, delta = c(1, 10))

Split celda feature module

Description

Manually select a celda feature module to split into 2 or more modules. Useful for splitting up modules that show divergent expression of features in multiple cell clusters.

Usage

splitModule(
  x,
  module,
  useAssay = "counts",
  altExpName = "featureSubset",
  n = 2,
  seed = 12345
)

## S4 method for signature 'SingleCellExperiment'
splitModule(
  x,
  module,
  useAssay = "counts",
  altExpName = "featureSubset",
  n = 2,
  seed = 12345
)

Arguments

x

A SingleCellExperiment object with the matrix located in the assay slot under useAssay. Rows represent features and columns represent cells.
module

Integer. The module to be split.
useAssay

A string specifying which assay slot to use for x. Default "counts".
altExpName

The name for the altExp slot to use. Default "featureSubset".
n

Integer. How many modules should module be split into. Default 2.
seed

Integer. Passed to with_seed. For reproducibility, a default value of 12345 is used. If NULL, no calls to with_seed are made.

Value

A updated SingleCellExperiment object with new feature modules stored in column celda_feature_module in rowData(x).

Examples

data(sceCeldaCG)
# Split module 5 into 2 new modules.
sce <- splitModule(sceCeldaCG, module = 5)

Subset celda model from SCE object returned from celdaGridSearch

Description

Select a subset of models from a SingleCellExperiment object generated by celdaGridSearch that match the criteria in the argument params.

Usage

subsetCeldaList(x, params, altExpName = "featureSubset")

## S4 method for signature 'SingleCellExperiment'
subsetCeldaList(x, params, altExpName = "featureSubset")

## S4 method for signature 'celdaList'
subsetCeldaList(x, params)

Arguments

x

Can be one of

  • A SingleCellExperiment object returned from celdaGridSearch, recursiveSplitModule, or recursiveSplitCell. Must contain a list named "celda_grid_search" in metadata(x).

  • celdaList object.
params

List. List of parameters used to subset the matching celda models in list "celda_grid_search" in metadata(x).
altExpName

The name for the altExp slot to use. Default "featureSubset".

Value

One of

  • A new SingleCellExperiment object containing all models matching the provided criteria in params. If only one celda model result in the "celda_grid_search" slot in metadata(x) matches the given criteria, a new SingleCellExperiment object with the matching model stored in the metadata "celda_parameters" slot will be returned. Otherwise, a new SingleCellExperiment object with the subset models stored in the metadata "celda_grid_search" slot will be returned.

  • A new celdaList object containing all models matching the provided criteria in params. If only one item in the celdaList matches the given criteria, the matching model will be returned directly instead of a celdaList object.

See Also

celdaGridSearch can run Celda with multiple parameters and chains in parallel. selectBestModel can get the best model for each combination of parameters.

Examples

data(sceCeldaCGGridSearch)
sceK5L10 <- subsetCeldaList(sceCeldaCGGridSearch,
    params = list(K = 5, L = 10))
data(celdaCGGridSearchRes)
resK5L10 <- subsetCeldaList(celdaCGGridSearchRes,
    params = list(K = 5, L = 10))

Identify features with the highest influence on clustering.

Description

topRank() can quickly identify the top 'n' rows for each column of a matrix. For example, this can be useful for identifying the top 'n' features per cell.

Usage

topRank(matrix, n = 25, margin = 2, threshold = 0, decreasing = TRUE)

Arguments

matrix

Numeric matrix.
n

Integer. Maximum number of items above 'threshold' returned for each ranked row or column.
margin

Integer. Dimension of 'matrix' to rank, with 1 for rows, 2 for columns. Default 2.
threshold

Numeric. Only return ranked rows or columns in the matrix that are above this threshold. If NULL, then no threshold will be applied. Default 0.
decreasing

Logical. Specifies if the rank should be decreasing. Default TRUE.

Value

List. The 'index' variable provides the top 'n' row (feature) indices contributing the most to each column (cell). The 'names' variable provides the rownames corresponding to these indexes.

Examples

data(sampleCells)
topRanksPerCell <- topRank(sampleCells, n = 5)
topFeatureNamesForCell <- topRanksPerCell$names[1]