{
  "_id": "6ac8db51de46216d5edd87dd",
  "Package": "BiocDuckDB",
  "Version": "0.99.25",
  "Date": "2026-09-30",
  "Title": "Bioconductor DuckDB Integration and High-Level I/O",
  "Description": "Integration package providing high-level Parquet I/O\nfunctions and optimized methods for single-cell analysis\nworkflows using DuckDB-backed data structures. Includes\nreadParquet and writeParquet functions for seamless\nserialization of SummarizedExperiment, SingleCellExperiment,\nMultiAssayExperiment, and MultiAssaySpatialExperiment objects,\nplus SQL-optimized implementations of scran and scuttle methods\nfor variance modeling, marker detection, QC metrics, and\nnormalization. This package brings together DuckDBDataFrame,\nDuckDBArray, DuckDBGRanges, and DuckDBSpatial (optional) for\ncomplete Bioconductor integration.",
  "Authors@R": "c(\nperson(\"Patrick\", \"Aboyoun\", role=c(\"aut\", \"cre\"), email=\"aboyounp@gene.com\"),\nperson(\"Genentech, Inc.\", role=\"cph\")\n)",
  "License": "MIT + file LICENSE",
  "URL": "https://github.com/Genentech/BiocDuckDB",
  "BugReports": "https://github.com/Genentech/BiocDuckDB/issues",
  "Copyright": "See the file inst/COPYRIGHTS for third-party schema\ncomponents bundled in inst/schema/ (Frictionless Data Package\nspecifications, in the public domain under The Unlicense).",
  "biocViews": "DataImport, DataRepresentation, Infrastructure, RNASeq,\nSequencing, SingleCell, Software",
  "VignetteBuilder": "knitr",
  "Encoding": "UTF-8",
  "Collate": "'BiocDuckDB-package.R'\n'MultiAssaySpatialExperiments-internals.R'\n'DuckDBDataFrame-spatial.R' 'DuckDBDualSubset-class.R'\n'initializeOptions.R' 'initializeCpp.R' 'DuckDBIrlbaParam.R'\n'DuckDBMatrix-scran.R' 'DuckDBMatrix-scuttle.R'\n'MultiAssaySpatialExperiment-query.R'\n'MultiAssaySpatialExperiment-spatial.R'\n'SingleCellExperiments-internals.R'\n'SingleCellExperiment-colTables.R'\n'SingleCellExperiment-loadings.R'\n'SingleCellExperiment-pairs.R'\n'SingleCellExperiment-rowTables.R' 'fieldtypes.R'\n'loadIntoMemory.R' 'readParquet.R' 'writeDatapackage.R'\n'writeParquet.R' 'writeStreamingResource.R'",
  "Config/roxygen2/version": "8.1.0",
  "Config/pak/sysreqs": "libabsl-dev cmake libgdal-dev gdal-bin libgeos-dev\nlibglpk-dev libmagick++-dev gsfonts libicu-dev libxml2-dev\nlibssl-dev libproj-dev libsqlite3-dev libudunits2-dev xz-utils\nzlib1g-dev",
  "Repository": "https://bioc.r-universe.dev",
  "Date/Publication": "2026-09-30 22:22:23 UTC",
  "RemoteUrl": "https://github.com/bioc/BiocDuckDB",
  "RemoteRef": "HEAD",
  "RemoteSha": "444d953f66149dedd3802a97a635727f67eedb24",
  "NeedsCompilation": "no",
  "Packaged": {
    "Date": "2026-10-09 11:58:06 UTC",
    "User": "root"
  },
  "Author": "Patrick Aboyoun [aut, cre],\nGenentech, Inc. [cph]",
  "Maintainer": "Patrick Aboyoun <aboyounp@gene.com>",
  "_user": "bioc",
  "_type": "src",
  "_file": "BiocDuckDB_0.99.25.tar.gz",
  "_fileid": "https://r2.ropensci.org/4f94be5e0a12740f80c85e850a778543420b57d139faa2b6ea3dfea06129b3f9",
  "_filesize": 601176,
  "_sha256": "4f94be5e0a12740f80c85e850a778543420b57d139faa2b6ea3dfea06129b3f9",
  "_expires": "2027-01-17T12:17:18.000Z",
  "_created": "2026-10-09T11:58:06.000Z",
  "_published": "2026-10-09T12:17:20.894Z",
  "_buildurl": "https://github.com/r-universe/bioc/actions/runs/37926457728",
  "_status": "success",
  "_host": "GitHub-Actions",
  "_bioccheck": {
    "error": 0,
    "warning": 0,
    "note": 8
  },
  "_upstream": "https://github.com/bioc/BiocDuckDB",
  "_commit": {
    "id": "444d953f66149dedd3802a97a635727f67eedb24",
    "author": "Patrick Aboyoun <aboyoun.patrick@gene.com>",
    "committer": "Patrick Aboyoun <aboyoun.patrick@gene.com>",
    "message": "docs: Document sizing writeCoordArray's grid for large or sparse writes\n\nwriteParquet()'s array delegation to writeCoordArray() inherits its default\ngrid, which budgets partitions from dim(x) alone with no sparsity awareness.\nCross-reference DuckDBArray::writeCoordArray's new density-correction section\n(setAutoBlockSize()/setAutoBlockShape()) and its hard ceiling. Add a third\n@examples entry and a matching vignette snippet showing those calls made\nbefore writeParquet() on a sparse matrix.\n",
    "time": 1790806943
  },
  "_maintainer": {
    "name": "Patrick Aboyoun",
    "email": "aboyounp@gene.com"
  },
  "_distro": "resolute",
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    {
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    {
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      "package": "arrow",
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  ],
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  "_updates": [
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  ],
  "_tags": [],
  "_bioc": [
    {
      "branch": "devel",
      "version": "0.99.25",
      "bioc": "3.24",
      "repository": "bioc"
    }
  ],
  "_topics": [
    "dataimport",
    "datarepresentation",
    "infrastructure",
    "rnaseq",
    "sequencing",
    "singlecell",
    "software"
  ],
  "_stars": 5,
  "_contributors": [
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      "count": 97,
      "uuid": 171627243
    }
  ],
  "_userbio": {
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    "type": "organization",
    "name": "Bioconductor",
    "followers": 475,
    "description": "Software for the analysis and comprehension of high-throughput genomic data"
  },
  "_downloads": {
    "count": 131,
    "source": "https://www.bioconductor.org/packages/stats/bioc/BiocDuckDB"
  },
  "_devurl": "https://github.com/genentech/biocduckdb",
  "_searchresults": 37,
  "_rbuild": "4.6.1",
  "_assets": [
    "extra/BiocDuckDB.html",
    "extra/citation.cff",
    "extra/citation.html",
    "extra/citation.json",
    "extra/citation.txt",
    "extra/contents.json",
    "extra/manual.pdf",
    "extra/NEWS.html",
    "extra/NEWS.txt",
    "extra/readme.html",
    "extra/readme.md",
    "LICENSE"
  ],
  "_homeurl": "https://github.com/genentech/biocduckdb",
  "_realowner": "bioc",
  "_cranurl": false,
  "_exports": [
    "annotateWithRegions",
    "calculateAverage",
    "calculateCPM",
    "calculateTPM",
    "colPair<-",
    "colPairs<-",
    "colTable",
    "colTable<-",
    "colTableNames",
    "colTableNames<-",
    "colTables",
    "colTables<-",
    "correlatePairs",
    "DuckDBIrlbaParam",
    "findMarkers",
    "geometricSizeFactors",
    "initializeCpp",
    "initializeOptions",
    "librarySizeFactors",
    "linkSpatialMap",
    "loadIntoMemory",
    "modelGeneCV2",
    "modelGeneVar",
    "modelGeneVarByPoisson",
    "normalizeCounts",
    "numDetectedAcrossFeatures",
    "pairwiseBinom",
    "pairwiseTTests",
    "perCellQCMetrics",
    "perFeatureQCMetrics",
    "readGeoParquetForMASE",
    "readParquet",
    "readParquetForMASE",
    "rowLoading",
    "rowLoading<-",
    "rowLoadingNames",
    "rowLoadingNames<-",
    "rowLoadings",
    "rowLoadings<-",
    "rowPair<-",
    "rowPairs<-",
    "rowTable",
    "rowTable<-",
    "rowTableNames",
    "rowTableNames<-",
    "rowTables",
    "rowTables<-",
    "runSVD",
    "scoreMarkers",
    "spatialCoordinateSystems",
    "spatialElementJoin",
    "spatialJoin",
    "spatialMatch",
    "spatialOverlaps",
    "spatialViews",
    "subsetByBoundingBox",
    "subsetByPolygon",
    "sumCountsAcrossFeatures",
    "summarizeAssayByGroup",
    "summaryMarkerStats",
    "validateSpatialMap",
    "writeDatapackage",
    "writeParquet",
    "writeStreamingResource"
  ],
  "_help": [
    {
      "page": "DuckDBDataFrame-spatial",
      "title": "DuckDBDataFrame spatial methods",
      "topics": [
        "DuckDBDataFrame-spatial",
        "spatialJoin,DuckDBDataFrame,DuckDBDataFrame-method",
        "spatialMatch,DuckDBDataFrame,DataFrame-method",
        "spatialMatch,DuckDBDataFrame,DuckDBDataFrame-method",
        "spatialOverlaps,DuckDBDataFrame-method"
      ]
    },
    {
      "page": "DuckDBDualSubset-class",
      "title": "DuckDBDualSubset objects",
      "topics": [
        "c,DuckDBDualSubset-method",
        "DuckDBDualSubset-class",
        "length,DuckDBDualSubset-method",
        "[,DuckDBDualSubset,ANY,ANY,ANY-method",
        "[<-,DuckDBDualSubset,ANY,ANY,ANY-method"
      ]
    },
    {
      "page": "DuckDBIrlbaParam",
      "title": "A fast SVD path for DuckDB-backed matrices",
      "topics": [
        "DuckDBIrlbaParam",
        "DuckDBIrlbaParam-class",
        "runSVD,DuckDBIrlbaParam-method"
      ]
    },
    {
      "page": "DuckDBMatrix-scran",
      "title": "DuckDBMatrix scran methods",
      "topics": [
        "correlatePairs,DuckDBMatrix-method",
        "DuckDBMatrix-scran",
        "findMarkers,DuckDBMatrix-method",
        "modelGeneCV2,DuckDBMatrix-method",
        "modelGeneVar,DuckDBMatrix-method",
        "modelGeneVarByPoisson,DuckDBMatrix-method",
        "pairwiseBinom,DuckDBMatrix-method",
        "pairwiseTTests,DuckDBMatrix-method",
        "scoreMarkers,DuckDBMatrix-method",
        "summaryMarkerStats,DuckDBMatrix-method"
      ]
    },
    {
      "page": "DuckDBMatrix-scuttle",
      "title": "DuckDBMatrix scuttle methods",
      "topics": [
        "calculateAverage,DuckDBMatrix-method",
        "calculateCPM,DuckDBMatrix-method",
        "calculateTPM,DuckDBMatrix-method",
        "DuckDBMatrix-scuttle",
        "geometricSizeFactors,DuckDBMatrix-method",
        "librarySizeFactors,DuckDBMatrix-method",
        "normalizeCounts,DuckDBMatrix-method",
        "numDetectedAcrossFeatures,DuckDBMatrix-method",
        "perCellQCMetrics,DuckDBMatrix-method",
        "perFeatureQCMetrics,DuckDBMatrix-method",
        "sumCountsAcrossFeatures,DuckDBMatrix-method",
        "summarizeAssayByGroup,DuckDBMatrix-method"
      ]
    },
    {
      "page": "initializeCpp",
      "title": "Initialize DuckDB-backed matrices for beachmat",
      "topics": [
        "initializeCpp",
        "initializeCpp,DuckDBArraySeed-method"
      ]
    },
    {
      "page": "initializeOptions",
      "title": "Options for DuckDB-backed matrices",
      "topics": [
        "initializeOptions"
      ]
    },
    {
      "page": "linkSpatialMap",
      "title": "Link assay observations to their spatial layer rows",
      "topics": [
        "linkSpatialMap"
      ]
    },
    {
      "page": "loadIntoMemory",
      "title": "Load a DuckDB-backed matrix into memory",
      "topics": [
        "loadIntoMemory"
      ]
    },
    {
      "page": "MultiAssaySpatialExperiment-spatial",
      "title": "MultiAssaySpatialExperiment lazy spatial methods",
      "topics": [
        "annotateWithRegions,MultiAssaySpatialExperiment-method",
        "MultiAssaySpatialExperiment-spatial",
        "readGeoParquetForMASE,character-method",
        "readParquetForMASE,character-method",
        "subsetByBoundingBox,MultiAssaySpatialExperiment-method",
        "subsetByPolygon,MultiAssaySpatialExperiment-method"
      ]
    },
    {
      "page": "readParquet",
      "title": "Read Parquet Representation of a Bioconductor Object",
      "topics": [
        "readParquet"
      ]
    },
    {
      "page": "SingleCellExperiment-colTables",
      "title": "Sample table methods",
      "topics": [
        "colTable",
        "colTable,SingleCellExperiment,character-method",
        "colTable,SingleCellExperiment,missing-method",
        "colTable,SingleCellExperiment,numeric-method",
        "colTable<-",
        "colTable<-,SingleCellExperiment,character-method",
        "colTable<-,SingleCellExperiment,missing-method",
        "colTable<-,SingleCellExperiment,numeric-method",
        "colTableNames",
        "colTableNames,SingleCellExperiment-method",
        "colTableNames<-",
        "colTableNames<-,SingleCellExperiment,character-method",
        "colTables",
        "colTables,SingleCellExperiment-method",
        "colTables<-",
        "colTables<-,SingleCellExperiment-method",
        "SingleCellExperiment-colTables"
      ]
    },
    {
      "page": "SingleCellExperiment-loadings",
      "title": "Feature loading methods",
      "topics": [
        "rowLoading",
        "rowLoading,SingleCellExperiment,character-method",
        "rowLoading,SingleCellExperiment,missing-method",
        "rowLoading,SingleCellExperiment,numeric-method",
        "rowLoading<-",
        "rowLoading<-,SingleCellExperiment,character-method",
        "rowLoading<-,SingleCellExperiment,missing-method",
        "rowLoading<-,SingleCellExperiment,numeric-method",
        "rowLoadingNames",
        "rowLoadingNames,SingleCellExperiment-method",
        "rowLoadingNames<-",
        "rowLoadingNames<-,SingleCellExperiment,character-method",
        "rowLoadings",
        "rowLoadings,SingleCellExperiment-method",
        "rowLoadings<-",
        "rowLoadings<-,SingleCellExperiment-method",
        "SingleCellExperiment-loadings"
      ]
    },
    {
      "page": "SingleCellExperiment-pairs",
      "title": "colPairs/rowPairs setters for DuckDBSelfHits",
      "topics": [
        "colPair<-,SingleCellExperiment,character,DuckDBSelfHits-method",
        "colPair<-,SingleCellExperiment,missing,DuckDBSelfHits-method",
        "colPair<-,SingleCellExperiment,numeric,DuckDBSelfHits-method",
        "colPairs<-,SingleCellExperiment,DuckDBSelfHits-method",
        "rowPair<-,SingleCellExperiment,character,DuckDBSelfHits-method",
        "rowPair<-,SingleCellExperiment,missing,DuckDBSelfHits-method",
        "rowPair<-,SingleCellExperiment,numeric,DuckDBSelfHits-method",
        "rowPairs<-,SingleCellExperiment,DuckDBSelfHits-method",
        "SingleCellExperiment-pairs"
      ]
    },
    {
      "page": "SingleCellExperiment-rowTables",
      "title": "Feature table methods",
      "topics": [
        "rowTable",
        "rowTable,SingleCellExperiment,character-method",
        "rowTable,SingleCellExperiment,missing-method",
        "rowTable,SingleCellExperiment,numeric-method",
        "rowTable<-",
        "rowTable<-,SingleCellExperiment,character-method",
        "rowTable<-,SingleCellExperiment,missing-method",
        "rowTable<-,SingleCellExperiment,numeric-method",
        "rowTableNames",
        "rowTableNames,SingleCellExperiment-method",
        "rowTableNames<-",
        "rowTableNames<-,SingleCellExperiment,character-method",
        "rowTables",
        "rowTables,SingleCellExperiment-method",
        "rowTables<-",
        "rowTables<-,SingleCellExperiment-method",
        "SingleCellExperiment-rowTables"
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    },
    {
      "page": "spatialCoordinateSystems",
      "title": "Coordinate systems of a MultiAssaySpatialExperiment",
      "topics": [
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    {
      "page": "spatialElementJoin",
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      "page": "spatialViews",
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      "topics": [
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      "page": "validateSpatialMap",
      "title": "Validate a MASE's spatialMap referential integrity",
      "topics": [
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    {
      "page": "writeDatapackage",
      "title": "Write a Frictionless datapackage.json envelope",
      "topics": [
        "writeDatapackage"
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    {
      "page": "writeParquet",
      "title": "Write Parquet Representation of a Bioconductor Object",
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        "writeParquet,Assays-method",
        "writeParquet,data.frame-method",
        "writeParquet,DataFrame-method",
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        "writeParquet,DuckDBGRangesList-method",
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        "writeParquet,DuckDBTransposedDataFrame-method",
        "writeParquet,ExperimentList-method",
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        "writeParquet,GenomicRangesList-method",
        "writeParquet,List-method",
        "writeParquet,list-method",
        "writeParquet,MultiAssayExperiment-method",
        "writeParquet,MultiAssaySpatialExperiment-method",
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        "writeParquet,SelfHits-method",
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        "writeParquet,SummarizedExperiment-method",
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      "page": "writeStreamingResource",
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