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plyr

Tools for Splitting, Applying and Combining Data

v1.8.9 · Oct 1, 2023 · MIT + file LICENSE

Description

A set of tools that solves a common set of problems: you need to break a big problem down into manageable pieces, operate on each piece and then put all the pieces back together. For example, you might want to fit a model to each spatial location or time point in your study, summarise data by panels or collapse high-dimensional arrays to simpler summary statistics. The development of 'plyr' has been generously supported by 'Becton Dickinson'.

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CRAN Check Status

14 OK
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Flavor Status
r-devel-linux-x86_64-debian-clang OK
r-devel-linux-x86_64-debian-gcc OK
r-devel-linux-x86_64-fedora-clang OK
r-devel-linux-x86_64-fedora-gcc OK
r-devel-macos-arm64 OK
r-devel-windows-x86_64 OK
r-oldrel-macos-arm64 OK
r-oldrel-macos-x86_64 OK
r-oldrel-windows-x86_64 OK
r-patched-linux-x86_64 OK
r-release-linux-x86_64 OK
r-release-macos-arm64 OK
r-release-macos-x86_64 OK
r-release-windows-x86_64 OK

Check History

OK 14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026

Reverse Dependencies (661)

imports

ACDm AGPRIS ANOPA ARIbrain ARTool Anaconda AppliedPredictiveModeling AquaticLifeHistory BATSS BAwiR BCHM BEACH BESTree BNSP BTSPAS BasketballAnalyzeR BayesFM BayesGWQS BioCircos BiostatsUHNplus Buddle C443 CAST CHAPGWAS CINNA CNAIM CNVScope CSDownscale CSTools CancerEvolutionVisualization ClusTCR2 ClustVarLV CoDiNA CoNI CohortMethod Coinprofile CompositeReliability CooccurrenceAffinity DALSM DBTC DDPNA DIFplus DImodelsMulti DPtree DataQualityDashboard Deducer DescribeDisplay DiNAMIC.Duo DiPs EFAutilities EcotoneFinder Epi ExcelFunctionsR ExpGenetic FAMetA FAOSTAT FMAT FRK FisherEM FuzzyR GFD GFDrmst GFDrmtl GFDsurv GROAN GSEMA GroupBN GrpString HLMdiag HVT HiResTEC HiveR HyMETT ISCA ITNr IVYplot Information InterfaceqPCR InterpretMSSpectrum IsingSampler IsoCor Kernelheaping LakeMetabolizer MAGNAMWAR MANOVA.RM MCPAN MEPDF MFPCA MGMM MHD MMD MRFA MRFcov MRPC MVNBayesian MagmaClustR MetaboQC MetabolomicsBasics MicrobTiSDA MplusAutomation MultiObjMatch NVCSSL NetOrigin OEFPIL OTrecod OpenRepGrid OptimalDesign OralOpioids PAFit PAMhm PPforest PTXQC PhylogeneticEM PieGlyph PopGenReport PopulateR PredPsych QurvE Qval R2DT R3port RCriteo RNOmni RNeXML RSA RSAtools RSP RSentiment RXKCD RankAggSIgFUR RchivalTag RcmdrPlugin.KMggplot2 RefManageR Rilostat Rnmr1D Rprofet Rspotify SDCNway SEERaBomb SNSequate SOMEnv SSNbayes SemNeT SeqFeatR SightabilityModel SimTimeVar SleepCycles SmartMeterAnalytics StatRank StratifiedBalancing SuperCell Sysrecon TDPanalysis TR8 TSPred TriMatch TripleR Umatrix UniprotR UpSetR VALERIE VDSM VulnToolkit WCE WRS2 XML2R aLFQ aMNLFA acc acca activAnalyzer aedseo allMT animint2 antaresEditObject antaresRead aoristic ardl.nardl aslib atable ausplotsR auto.pca azuremlsdk bayesPop bayesboot baytrends bea.R bfw bigmatch blocksdesign bpa breakfast bruceR bspcov burnr cancerradarr caret catSurv cdmTools charisma chem16S chillR chouca classifly clhs clickstream clinDataReview clinUtils clusternomics clustrd coda4microbiome coefplot colorrepel colors3d comf compositeReliabilityInNestedDesigns condvis2 confidence convertid corporaexplorer cpsurvsim crmReg crossnma crypto2 ctsem ctsemOMX cvms cyclomort d3Network dLagM dMod dae darksky dartR dartR.base dartR.popgen dataframeexplorer dataone ddpcr deBInfer deepSTRAPP deforestable descsuppR detectRUNS detrendr devFunc difNLR dissever do dplyrAssist drcSeedGerm drcte dsm dtp dynr eatGADS eatRep echor ecoCopula econet elhmc emdbook erp.easy esaddle esaps esviz europepmc evoper exifr expandFunctions expowo extraSuperpower ez fSRM fasstr fastpos fbRads featurefinder filters fingerPro finnts flip flippant foqat forestinventory forestmangr forestr fractD ftaproxim gJLS2 gMOIP gProfileR gcbd gems gemtc gen5helper geonapi geospt germinationmetrics ggenealogy ggiraphExtra ggmap ggpmisc ggstance ggtern ghypernet glinvci glsm gmoTree grabsampling grandR gridsampler groupdata2 growthcleanr gwasrapidd hbamr hdImpute hdcuremodels hillR hpiR hyfo iCellR icardaFIGSr idiogramFISH immunarch immunaut inTextSummaryTable inctools inegiR inlabru intRvals intsvy invctr inventorize ips isocat itraxR its.analysis jackstrap jocre kamila kgraph kimisc knnp kutils lavaangui lazysql lddmm learningr lemon lfda lfl lfstat likelihoodExplore likert lilikoi llama lmDiallel lmmpar loa longreadvqs longsurr lsirm12pl lucas marcher mashr matchMulti mcmsupply meifly meltt metR metafolio metamisc meteo mgcViz microbial missCompare mitre mizer mlergm mlfit mlr3shiny modnets mplot mpoly msig mulea multChernoff multiApply multifear multilevelPSA multpois musclesyneRgies mvMonitoring mvdalab nasadata nat nat.nblast natstrat netmediate nhanesA npsm oai olr omu ontoFAST openCR optiSel optiSolve pARI paco pagoda2 patientProfilesVis pbANOVA pda permutes petersenlab phase1PRMD phenomap phenopix photobiology plotROC plotluck plsgenomics pogit pointRes poliscidata populationPDXdesign powerbydesign ppmlasso predict3d predictmeans presmoothedTP prettymapr primerTree productplots profr psyntur ptycho pureseqtmr puzzle qape qgam qgraph quest rLakeAnalyzer rSPARCS rYoutheria rapportools rbiom rcompanion rcrossref readbulk readmoRe rearrr rechaRge redlistr repmis reshape reshape2 reslr respirometry ridigbio rinat rlfsm roadoi robustvarComp rprime rqPen rscopus rsdmx rslp rtematres rtrend rwty s2dv sRNAGenetic sampsizeval santaR satellite scanstatistics sccca segclust2d segmag semPlot seqimpute sequoia sharpshootR sievePH simET simr solrium spant spatialwarnings spectacles spef splithalf spongecake ssdtools ssifs statConfR statcheck str2str strvalidator subscreen superb superheat survELtest surveybootstrap surveyvoi swaglm synthpop tashu tauturri testarguments texter tidyGenR tnl.Test treeclim tsdataleaks ufs ultrapolaRplot upndown uptimeRobot useful ustyc virtualPollen viscomp visvow wTO whitechapelR whitewater whomds wid wilson wppExplorer wxgenR xpectr zTree zdeskR zen4R

Dependency Network

Dependencies Reverse dependencies Rcpp Autoplotprotein CPMCGLM DataLoader Fgmutils MScombine PdPDB RGBM RSAGA Rmisc SPCDAnalyze abctools alternativeROC bcpa blink cft +646 more reverse deps plyr

Version History

new 1.8.9 Mar 10, 2026
updated 1.8.9 ← 1.8.8 diff Oct 1, 2023
updated 1.8.8 ← 1.8.7 diff Nov 10, 2022
updated 1.8.7 ← 1.8.6 diff Mar 23, 2022
updated 1.8.6 ← 1.8.5 diff Mar 2, 2020
updated 1.8.5 ← 1.8.4 diff Dec 9, 2019
updated 1.8.4 ← 1.8.3 diff Jun 7, 2016
updated 1.8.3 ← 1.8.2 diff Jun 11, 2015
updated 1.8.2 ← 1.8.1 diff Apr 20, 2015
updated 1.8.1 ← 1.8 diff Feb 25, 2014
updated 1.8 ← 1.7.1 diff Dec 5, 2012
updated 1.7.1 ← 1.7 diff Jan 7, 2012
updated 1.7 ← 1.6 diff Dec 29, 2011
updated 1.6 ← 1.5.2 diff Jul 28, 2011
updated 1.5.2 ← 1.5.1 diff Apr 23, 2011
updated 1.5.1 ← 1.5 diff Apr 12, 2011
updated 1.5 ← 1.4.1 diff Apr 9, 2011
updated 1.4.1 ← 1.4 diff Apr 4, 2011
updated 1.4 ← 1.2.1 diff Jan 3, 2011
updated 1.2.1 ← 1.2 diff Sep 10, 2010