Basics

Install derfinderPlot

R is an open-source statistical environment which can be easily modified to enhance its functionality via packages. derfinderPlot is a R package available via the Bioconductor repository for packages. R can be installed on any operating system from CRAN after which you can install derfinderPlot by using the following commands in your R session:

if (!requireNamespace("BiocManager", quietly = TRUE)) {
    install.packages("BiocManager")
}

BiocManager::install("derfinderPlot")

## Check that you have a valid Bioconductor installation
BiocManager::valid()

Required knowledge

derfinderPlot is based on many other packages and in particular in those that have implemented the infrastructure needed for dealing with RNA-seq data. A derfinderPlot user is not expected to deal with those packages directly but will need to be familiar with derfinder and for some plots with ggbio.

If you are asking yourself the question “Where do I start using Bioconductor?” you might be interested in this blog post.

Asking for help

As package developers, we try to explain clearly how to use our packages and in which order to use the functions. But R and Bioconductor have a steep learning curve so it is critical to learn where to ask for help. The blog post quoted above mentions some but we would like to highlight the Bioconductor support site as the main resource for getting help: remember to use the derfinder or derfinderPlot tags and check the older posts. Other alternatives are available such as creating GitHub issues and tweeting. However, please note that if you want to receive help you should adhere to the posting guidelines. It is particularly critical that you provide a small reproducible example and your session information so package developers can track down the source of the error.

Citing derfinderPlot

We hope that derfinderPlot will be useful for your research. Please use the following information to cite the package and the overall approach. Thank you!

## Citation info
citation("derfinderPlot")

## To cite package 'derfinderPlot' in publications use:
## 
##   Collado-Torres L, Jaffe AE, Leek JT (2017). _derfinderPlot: Plotting
##   functions for derfinder_. doi:10.18129/B9.bioc.derfinderPlot
##   <https://doi.org/10.18129/B9.bioc.derfinderPlot>,
##   https://github.com/leekgroup/derfinderPlot - R package version
##   1.41.0, <http://www.bioconductor.org/packages/derfinderPlot>.
## 
##   Collado-Torres L, Nellore A, Frazee AC, Wilks C, Love MI, Langmead B,
##   Irizarry RA, Leek JT, Jaffe AE (2017). "Flexible expressed region
##   analysis for RNA-seq with derfinder." _Nucl. Acids Res._.
##   doi:10.1093/nar/gkw852 <https://doi.org/10.1093/nar/gkw852>,
##   <http://nar.oxfordjournals.org/content/early/2016/09/29/nar.gkw852>.
## 
## To see these entries in BibTeX format, use 'print(<citation>,
## bibtex=TRUE)', 'toBibtex(.)', or set
## 'options(citation.bibtex.max=999)'.

Introduction to derfinderPlot

derfinderPlot (Collado-Torres, Jaffe, and Leek, 2017) is an addon package for derfinder (Collado-Torres, Nellore, Frazee, Wilks, Love, Langmead, Irizarry, Leek, and Jaffe, 2017) with functions that allow you to visualize the results.

While the functions in derfinderPlot assume you generated the data with derfinder, they can be used with other GRanges objects properly formatted.

The functions in derfinderPlot are:

plotCluster() is a tailored ggbio (Yin, Cook, and Lawrence, 2012) plot that shows all the regions in a cluster (defined by distance). It shows the base-level coverage for each sample as well as the mean for each group. If these regions overlap any known gene, the gene and the transcript annotation is displayed.
plotOverview() is another tailored ggbio (Yin, Cook, and Lawrence, 2012) plot showing an overview of the whole genome. This plot can be useful to observe if the regions are clustered in a subset of a chromosome. It can also be used to check whether the regions match predominantly one part of the gene structure (for example, 3’ overlaps).
plotRegionCoverage() is a fast plotting function using R base graphics that shows the base-level coverage for each sample inside a specific region of the genome. If the region overlaps any known gene or intron, the information is displayed. Optionally, it can display the known transcripts. This function is most likely the easiest to use with GRanges objects from other packages.

Example

As an example, we will analyze a small subset of the samples from the BrainSpan Atlas of the Human Brain (BrainSpan, 2011) publicly available data.

We first load the required packages.

## Load libraries
suppressPackageStartupMessages(library("derfinder"))
library("derfinderData")
library("derfinderPlot")

## Registered S3 method overwritten by 'GGally':
##   method from   
##   +.gg   ggplot2

Analyze data

For this example, we created a small table with the relevant phenotype data for 12 samples: 6 from fetal samples and 6 from adult samples. We chose at random a brain region, in this case the primary auditory cortex (core) and for the example we will only look at data from chromosome 21. Other variables include the age in years and the gender. The data is shown below.

library("knitr")
## Get pheno table
pheno <- subset(brainspanPheno, structure_acronym == "A1C")

## Display the main information
p <- pheno[, -which(colnames(pheno) %in% c(
    "structure_acronym",
    "structure_name", "file"
))]
rownames(p) <- NULL
kable(p, format = "html", row.names = TRUE)

	gender	lab	Age	group
1	M	HSB114.A1C	-0.5192308	fetal
2	M	HSB103.A1C	-0.5192308	fetal
3	M	HSB178.A1C	-0.4615385	fetal
4	M	HSB154.A1C	-0.4615385	fetal
5	F	HSB150.A1C	-0.5384615	fetal
6	F	HSB149.A1C	-0.5192308	fetal
7	F	HSB130.A1C	21.0000000	adult
8	M	HSB136.A1C	23.0000000	adult
9	F	HSB126.A1C	30.0000000	adult
10	M	HSB145.A1C	36.0000000	adult
11	M	HSB123.A1C	37.0000000	adult
12	F	HSB135.A1C	40.0000000	adult

We can load the data from derfinderData (Collado-Torres, Jaffe, and Leek, 2024) by first identifying the paths to the BigWig files with derfinder::rawFiles() and then loading the data with derfinder::fullCoverage().

## Determine the files to use and fix the names
files <- rawFiles(system.file("extdata", "A1C", package = "derfinderData"),
    samplepatt = "bw", fileterm = NULL
)
names(files) <- gsub(".bw", "", names(files))

## Load the data from disk
system.time(fullCov <- fullCoverage(files = files, chrs = "chr21"))

## 2025-03-24 06:18:20.534266 fullCoverage: processing chromosome chr21

## 2025-03-24 06:18:20.54675 loadCoverage: finding chromosome lengths

## 2025-03-24 06:18:20.568061 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB103.bw

## 2025-03-24 06:18:20.720973 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB114.bw

## 2025-03-24 06:18:20.864777 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB123.bw

## 2025-03-24 06:18:20.966437 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB126.bw

## 2025-03-24 06:18:21.037069 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB130.bw

## 2025-03-24 06:18:21.133166 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB135.bw

## 2025-03-24 06:18:21.202366 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB136.bw

## 2025-03-24 06:18:21.273772 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB145.bw

## 2025-03-24 06:18:21.362816 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB149.bw

## 2025-03-24 06:18:21.451792 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB150.bw

## 2025-03-24 06:18:21.524071 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB154.bw

## 2025-03-24 06:18:22.446216 loadCoverage: loading BigWig file /github/workspace/pkglib/derfinderData/extdata/A1C/HSB178.bw

## 2025-03-24 06:18:22.542662 loadCoverage: applying the cutoff to the merged data

## 2025-03-24 06:18:22.563978 filterData: originally there were 48129895 rows, now there are 48129895 rows. Meaning that 0 percent was filtered.

##    user  system elapsed 
##   2.048   0.028   2.077

Alternatively, since the BigWig files are publicly available from BrainSpan (see here), we can extract the relevant coverage data using derfinder::fullCoverage(). Note that as of rtracklayer 1.25.16 BigWig files are not supported on Windows: you can find the fullCov object inside derfinderData to follow the examples.

## Determine the files to use and fix the names
files <- pheno$file
names(files) <- gsub(".A1C", "", pheno$lab)

## Load the data from the web
system.time(fullCov <- fullCoverage(files = files, chrs = "chr21"))

Once we have the base-level coverage data for all 12 samples, we can construct the models. In this case, we want to find differences between fetal and adult samples while adjusting for gender and a proxy of the library size.

## Get some idea of the library sizes
sampleDepths <- sampleDepth(collapseFullCoverage(fullCov), 1)

## 2025-03-24 06:18:22.640775 sampleDepth: Calculating sample quantiles

## 2025-03-24 06:18:22.731136 sampleDepth: Calculating sample adjustments

## Define models
models <- makeModels(sampleDepths,
    testvars = pheno$group,
    adjustvars = pheno[, c("gender")]
)

Next, we can find candidate differentially expressed regions (DERs) using as input the segments of the genome where at least one sample has coverage greater than 3. In this particular example, we chose a low theoretical F-statistic cutoff and used 20 permutations.

## Filter coverage
filteredCov <- lapply(fullCov, filterData, cutoff = 3)

## 2025-03-24 06:18:22.968338 filterData: originally there were 48129895 rows, now there are 90023 rows. Meaning that 99.81 percent was filtered.

## Perform differential expression analysis
suppressPackageStartupMessages(library("bumphunter"))
system.time(results <- analyzeChr(
    chr = "chr21", filteredCov$chr21,
    models, groupInfo = pheno$group, writeOutput = FALSE,
    cutoffFstat = 5e-02, nPermute = 20, seeds = 20140923 + seq_len(20)
))

## 2025-03-24 06:18:23.905321 analyzeChr: Pre-processing the coverage data

## 2025-03-24 06:18:25.190333 analyzeChr: Calculating statistics

## 2025-03-24 06:18:25.192866 calculateStats: calculating the F-statistics

## 2025-03-24 06:18:25.329214 analyzeChr: Calculating pvalues

## 2025-03-24 06:18:25.329885 analyzeChr: Using the following theoretical cutoff for the F-statistics 5.31765507157871

## 2025-03-24 06:18:25.331167 calculatePvalues: identifying data segments

## 2025-03-24 06:18:25.338867 findRegions: segmenting information

## 2025-03-24 06:18:25.370991 findRegions: identifying candidate regions

## 2025-03-24 06:18:25.422377 findRegions: identifying region clusters

## 2025-03-24 06:18:25.523849 calculatePvalues: calculating F-statistics for permutation 1 and seed 20140924

## 2025-03-24 06:18:25.63775 findRegions: segmenting information

## 2025-03-24 06:18:25.666116 findRegions: identifying candidate regions

## 2025-03-24 06:18:25.726116 calculatePvalues: calculating F-statistics for permutation 2 and seed 20140925

## 2025-03-24 06:18:25.848289 findRegions: segmenting information

## 2025-03-24 06:18:25.877858 findRegions: identifying candidate regions

## 2025-03-24 06:18:25.92305 calculatePvalues: calculating F-statistics for permutation 3 and seed 20140926

## 2025-03-24 06:18:26.042578 findRegions: segmenting information

## 2025-03-24 06:18:26.071167 findRegions: identifying candidate regions

## 2025-03-24 06:18:26.114866 calculatePvalues: calculating F-statistics for permutation 4 and seed 20140927

## 2025-03-24 06:18:26.239519 findRegions: segmenting information

## 2025-03-24 06:18:26.26773 findRegions: identifying candidate regions

## 2025-03-24 06:18:26.312383 calculatePvalues: calculating F-statistics for permutation 5 and seed 20140928

## 2025-03-24 06:18:26.433271 findRegions: segmenting information

## 2025-03-24 06:18:26.461676 findRegions: identifying candidate regions

## 2025-03-24 06:18:26.505399 calculatePvalues: calculating F-statistics for permutation 6 and seed 20140929

## 2025-03-24 06:18:26.626198 findRegions: segmenting information

## 2025-03-24 06:18:26.654511 findRegions: identifying candidate regions

## 2025-03-24 06:18:26.698218 calculatePvalues: calculating F-statistics for permutation 7 and seed 20140930

## 2025-03-24 06:18:26.82113 findRegions: segmenting information

## 2025-03-24 06:18:26.850863 findRegions: identifying candidate regions

## 2025-03-24 06:18:26.898145 calculatePvalues: calculating F-statistics for permutation 8 and seed 20140931

## 2025-03-24 06:18:27.018548 findRegions: segmenting information

## 2025-03-24 06:18:27.047004 findRegions: identifying candidate regions

## 2025-03-24 06:18:27.091223 calculatePvalues: calculating F-statistics for permutation 9 and seed 20140932

## 2025-03-24 06:18:27.211965 findRegions: segmenting information

## 2025-03-24 06:18:27.240177 findRegions: identifying candidate regions

## 2025-03-24 06:18:27.285654 calculatePvalues: calculating F-statistics for permutation 10 and seed 20140933

## 2025-03-24 06:18:28.227868 findRegions: segmenting information

## 2025-03-24 06:18:28.25592 findRegions: identifying candidate regions

## 2025-03-24 06:18:28.299614 calculatePvalues: calculating F-statistics for permutation 11 and seed 20140934

## 2025-03-24 06:18:28.42015 findRegions: segmenting information

## 2025-03-24 06:18:28.449308 findRegions: identifying candidate regions

## 2025-03-24 06:18:28.492743 calculatePvalues: calculating F-statistics for permutation 12 and seed 20140935

## 2025-03-24 06:18:28.616089 findRegions: segmenting information

## 2025-03-24 06:18:28.644261 findRegions: identifying candidate regions

## 2025-03-24 06:18:28.687558 calculatePvalues: calculating F-statistics for permutation 13 and seed 20140936

## 2025-03-24 06:18:28.805314 findRegions: segmenting information

## 2025-03-24 06:18:28.836201 findRegions: identifying candidate regions

## 2025-03-24 06:18:28.883753 calculatePvalues: calculating F-statistics for permutation 14 and seed 20140937

## 2025-03-24 06:18:29.002679 findRegions: segmenting information

## 2025-03-24 06:18:29.03047 findRegions: identifying candidate regions

## 2025-03-24 06:18:29.07438 calculatePvalues: calculating F-statistics for permutation 15 and seed 20140938

## 2025-03-24 06:18:29.197242 findRegions: segmenting information

## 2025-03-24 06:18:29.224947 findRegions: identifying candidate regions

## 2025-03-24 06:18:29.267972 calculatePvalues: calculating F-statistics for permutation 16 and seed 20140939

## 2025-03-24 06:18:29.390652 findRegions: segmenting information

## 2025-03-24 06:18:29.418559 findRegions: identifying candidate regions

## 2025-03-24 06:18:29.461683 calculatePvalues: calculating F-statistics for permutation 17 and seed 20140940

## 2025-03-24 06:18:29.575268 findRegions: segmenting information

## 2025-03-24 06:18:29.603235 findRegions: identifying candidate regions

## 2025-03-24 06:18:29.646607 calculatePvalues: calculating F-statistics for permutation 18 and seed 20140941

## 2025-03-24 06:18:29.769302 findRegions: segmenting information

## 2025-03-24 06:18:29.797536 findRegions: identifying candidate regions

## 2025-03-24 06:18:29.846201 calculatePvalues: calculating F-statistics for permutation 19 and seed 20140942

## 2025-03-24 06:18:29.960238 findRegions: segmenting information

## 2025-03-24 06:18:29.988271 findRegions: identifying candidate regions

## 2025-03-24 06:18:30.031685 calculatePvalues: calculating F-statistics for permutation 20 and seed 20140943

## 2025-03-24 06:18:30.152217 findRegions: segmenting information

## 2025-03-24 06:18:30.180203 findRegions: identifying candidate regions

## 2025-03-24 06:18:30.247992 calculatePvalues: calculating the p-values

## 2025-03-24 06:18:30.29505 analyzeChr: Annotating regions

## No annotationPackage supplied. Trying org.Hs.eg.db.

## Loading required package: org.Hs.eg.db

## Loading required package: AnnotationDbi

## Loading required package: Biobase

## Welcome to Bioconductor
## 
##     Vignettes contain introductory material; view with
##     'browseVignettes()'. To cite Bioconductor, see
##     'citation("Biobase")', and for packages 'citation("pkgname")'.

##

## Getting TSS and TSE.

## Getting CSS and CSE.

## Getting exons.

## Annotating genes.

## ...

##    user  system elapsed 
##  45.552   7.086  44.750

## Quick access to the results
regions <- results$regions$regions

## Annotation database to use
suppressPackageStartupMessages(library("TxDb.Hsapiens.UCSC.hg19.knownGene"))
txdb <- TxDb.Hsapiens.UCSC.hg19.knownGene

`plotOverview()`

Now that we have obtained the main results using derfinder, we can proceed to visualizing the results using derfinderPlot. The easiest to use of all the functions is plotOverview() which takes a set of regions and annotation information produced by bumphunter::matchGenes().

Figure @ref(fig:plotOverview) shows the candidate DERs colored by whether their q-value was less than 0.10 or not.

## Q-values overview
plotOverview(regions = regions, annotation = results$annotation, type = "qval")

## 2025-03-24 06:19:08.77674 plotOverview: assigning chromosome lengths from hg19!

## Scale for x is already present.
## Adding another scale for x, which will replace the existing scale.
## Scale for x is already present.
## Adding another scale for x, which will replace the existing scale.

Location of the DERs in the genome. This plot is was designed for many chromosomes but only one is shown here for simplicity.

Figure @ref(fig:plotOverview2) shows the candidate DERs colored by the type of gene feature they are nearest too.

## Annotation overview
plotOverview(
    regions = regions, annotation = results$annotation,
    type = "annotation"
)

## 2025-03-24 06:19:09.906167 plotOverview: assigning chromosome lengths from hg19!

## Scale for x is already present.
## Adding another scale for x, which will replace the existing scale.

Location of the DERs in the genome and colored by annotation class. This plot is was designed for many chromosomes but only one is shown here for simplicity.

In this particular example, because we are only using data from one chromosome the above plot is not as informative as in a real case scenario. However, with this plot we can quickly observe that nearly all of the candidate DERs are inside an exon.

`plotRegionCoverage()`

The complete opposite of visualizing the candidate DERs at the genome-level is to visualize them one region at a time. plotRegionCoverage() allows us to do this quickly for a large number of regions.

Before using this function, we need to process more detailed information using two derfinder functions: annotateRegions() and getRegionCoverage() as shown below.

## Get required information for the plots
annoRegs <- annotateRegions(regions, genomicState$fullGenome)

## 2025-03-24 06:19:10.492795 annotateRegions: counting

## 2025-03-24 06:19:10.549582 annotateRegions: annotating

regionCov <- getRegionCoverage(fullCov, regions)

## 2025-03-24 06:19:10.667458 getRegionCoverage: processing chr21

## 2025-03-24 06:19:10.708595 getRegionCoverage: done processing chr21

Once we have the relevant information we can proceed to plotting the first 10 regions. In this case, we will supply plotRegionCoverage() with the information it needs to plot transcripts overlapping these 10 regions (Figures @ref(fig:plotRegCov1), @ref(fig:plotRegCov2), @ref(fig:plotRegCov3), @ref(fig:plotRegCov4), @ref(fig:plotRegCov5), @ref(fig:plotRegCov6), @ref(fig:plotRegCov7), @ref(fig:plotRegCov8), @ref(fig:plotRegCov9), @ref(fig:plotRegCov10)).

## Plot top 10 regions
plotRegionCoverage(
    regions = regions, regionCoverage = regionCov,
    groupInfo = pheno$group, nearestAnnotation = results$annotation,
    annotatedRegions = annoRegs, whichRegions = 1:10, txdb = txdb, scalefac = 1,
    ask = FALSE, verbose = FALSE
)

Base-pair resolution plot of differentially expressed region 1.

Base-pair resolution plot of differentially expressed region 2.

Base-pair resolution plot of differentially expressed region 3.

Base-pair resolution plot of differentially expressed region 4.

Base-pair resolution plot of differentially expressed region 5.

Base-pair resolution plot of differentially expressed region 6.

Base-pair resolution plot of differentially expressed region 7.

Base-pair resolution plot of differentially expressed region 8.

Base-pair resolution plot of differentially expressed region 9.

Base-pair resolution plot of differentially expressed region 10.

The base-level coverage is shown in a log2 scale with any overlapping exons shown in dark blue and known introns in light blue.

`plotCluster()`

In this example, we noticed with the plotRegionCoverage() plots that most of the candidate DERs are contained in known exons. Sometimes, the signal might be low or we might have used very stringent cutoffs in the derfinder analysis. One way we can observe this is by plotting clusters of regions where a cluster is defined as regions within 300 bp (default option) of each other.

To visualize the clusters, we can use plotCluster() which takes similar input to plotOverview() with the notable addition of the coverage information as well as the idx argument. This argument specifies which region to focus on: it will be plotted with a red bar and will determine the cluster to display.

In Figure @ref(fig:plotCluster) we observe one large candidate DER with other nearby ones that do not have a q-value less than 0.10. In a real analysis, we would probably discard this region as the coverage is fairly low.

## First cluster
plotCluster(
    idx = 1, regions = regions, annotation = results$annotation,
    coverageInfo = fullCov$chr21, txdb = txdb, groupInfo = pheno$group,
    titleUse = "pval"
)

## Parsing transcripts...

## Parsing exons...

## Parsing cds...

## Parsing utrs...

## ------exons...

## ------cdss...

## ------introns...

## ------utr...

## aggregating...

## Done

## Constructing graphics...

Cluster plot for cluster 1 using ggbio.

The second cluster (Figure @ref(fig:plotCluster2)) shows a larger number of potential DERs (again without q-values less than 0.10) in a segment of the genome where the coverage data is highly variable. This is a common occurrence with RNA-seq data.

## Second cluster
plotCluster(
    idx = 2, regions = regions, annotation = results$annotation,
    coverageInfo = fullCov$chr21, txdb = txdb, groupInfo = pheno$group,
    titleUse = "pval"
)

## Parsing transcripts...

## Parsing exons...

## Parsing cds...

## Parsing utrs...

## ------exons...

## ------cdss...

## ------introns...

## ------utr...

## aggregating...

## Done

## Constructing graphics...

## Warning in !vapply(ggl, fixed, logical(1L)) & !vapply(PlotList, is, "Ideogram",
## : longer object length is not a multiple of shorter object length

## Warning in scale_y_continuous(trans = log2_trans()): log-2 transformation
## introduced infinite values.

Cluster plot for cluster 2 using ggbio.

These plots show an ideogram which helps quickly identify which region of the genome we are focusing on. Then, the base-level coverage information for each sample is displayed in log2. Next, the coverage group means are shown in the log2 scale. The plot is completed with the potential and candidate DERs as well as any known transcripts.

`vennRegions`

derfinder has functions for annotating regions given their genomic state. A typical visualization is to then view how many regions overlap known exons, introns, intergenic regions, none of them or several of these groups in a venn diagram. The function vennRegions() makes this plot using the output from derfinder::annotateRegions() as shown in Figure @ref(fig:vennRegions).

## Make venn diagram
venn <- vennRegions(annoRegs)

Venn diagram of regions by annotation class.

## It returns the actual venn counts information
venn

##   exon intergenic intron Counts
## 1    0          0      0      0
## 2    0          0      1      2
## 3    0          1      0      4
## 4    0          1      1      0
## 5    1          0      0    259
## 6    1          0      1     35
## 7    1          1      0      0
## 8    1          1      1      0
## attr(,"class")
## [1] "VennCounts"

Reproducibility

This package was made possible thanks to:

R (R Core Team, 2025)
GenomeInfoDb (Arora, Morgan, Carlson, and Pagès, 2017)
GenomicRanges (Lawrence, Huber, Pagès, Aboyoun, Carlson, Gentleman, Morgan, and Carey, 2013)
ggbio (Yin, Cook, and Lawrence, 2012)
ggplot2 (Wickham, 2016)
IRanges (Lawrence, Huber, Pagès et al., 2013)
plyr (Wickham, 2011)
RColorBrewer (Neuwirth, 2022)
reshape2 (Wickham, 2007)
scales (Wickham, Pedersen, and Seidel, 2023)
biovizBase (Yin, Lawrence, and Cook, 2025)
bumphunter (Jaffe, Murakami, Lee, Leek, Fallin, Feinberg, and Irizarry, 2012) and (Jaffe, Murakami, Lee, Leek, Fallin, Feinberg, and Irizarry, 2012)
derfinder (Collado-Torres, Nellore, Frazee et al., 2017)
derfinderData (Collado-Torres, Jaffe, and Leek, 2024)
sessioninfo (Wickham, Chang, Flight, Müller, and Hester, 2025)
knitr (Xie, 2014)
BiocStyle (Oleś, 2025)
RefManageR (McLean, 2017)
rmarkdown (Allaire, Xie, Dervieux, McPherson, Luraschi, Ushey, Atkins, Wickham, Cheng, Chang, and Iannone, 2024)
testthat (Wickham, 2011)
TxDb.Hsapiens.UCSC.hg19.knownGene (Carlson and Maintainer, 2015)

Code for creating the vignette

## Create the vignette
library("rmarkdown")
system.time(render("derfinderPlot.Rmd", "BiocStyle::html_document"))

## Extract the R code
library("knitr")
knit("derfinderPlot.Rmd", tangle = TRUE)

## Clean up
unlink("chr21", recursive = TRUE)

Date the vignette was generated.

## [1] "2025-03-24 06:19:25 UTC"

Wallclock time spent generating the vignette.

## Time difference of 1.292 mins

R session information.

## ─ Session info ───────────────────────────────────────────────────────────────────────────────────────────────────────
##  setting  value
##  version  R version 4.4.3 (2025-02-28)
##  os       Ubuntu 24.04.2 LTS
##  system   x86_64, linux-gnu
##  ui       X11
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## 
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##  derfinderData                     * 2.24.0    2024-10-31 [2] Bioconductor 3.20 (R 4.4.3)
##  derfinderHelper                     1.41.0    2025-03-13 [2] https://bioc.r-universe.dev (R 4.4.3)
##  derfinderPlot                     * 1.41.0    2025-03-24 [1] https://bioc.r-universe.dev (R 4.4.3)
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##  gridExtra                           2.3       2017-09-09 [2] RSPM (R 4.4.0)
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##  memoise                             2.0.1     2021-11-26 [2] RSPM (R 4.4.0)
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##  plyr                                1.8.9     2023-10-02 [2] RSPM (R 4.4.0)
##  png                                 0.1-8     2022-11-29 [2] RSPM (R 4.4.0)
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##  qvalue                              2.39.0    2025-03-19 [2] https://bioc.r-universe.dev (R 4.4.3)
##  R6                                  2.6.1     2025-02-15 [2] RSPM (R 4.4.0)
##  rappdirs                            0.3.3     2021-01-31 [2] RSPM (R 4.4.0)
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##  RColorBrewer                        1.1-3     2022-04-03 [2] RSPM (R 4.4.0)
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##  reshape2                            1.4.4     2020-04-09 [2] RSPM (R 4.4.0)
##  restfulr                            0.0.15    2022-06-16 [2] RSPM (R 4.4.3)
##  rjson                               0.2.23    2024-09-16 [2] RSPM (R 4.4.0)
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##  tibble                              3.2.1     2023-03-20 [2] RSPM (R 4.4.0)
##  tidyr                               1.3.1     2024-01-24 [2] RSPM (R 4.4.0)
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## 
##  [1] /tmp/RtmpBZIOYF/Rinst207648e8983c
##  [2] /github/workspace/pkglib
##  [3] /usr/local/lib/R/site-library
##  [4] /usr/lib/R/site-library
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##  * ── Packages attached to the search path.
## 
## ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

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This vignette was generated using BiocStyle (Oleś, 2025) with knitr (Xie, 2014) and rmarkdown (Allaire, Xie, Dervieux et al., 2024) running behind the scenes.

Citations made with RefManageR (McLean, 2017).

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