data.table: Extension of data.frame

Fast aggregation of large data (e.g. 100GB in RAM), fast ordered joins, fast add/modify/delete of columns by group using no copies at all, list columns and a fast file reader (fread). Offers a natural and flexible syntax, for faster development.

Version: 1.9.2
Depends: R (≥ 2.14.0)
Imports: methods, reshape2
Suggests: chron, ggplot2 (≥ 0.9.0), plyr, reshape, testthat (≥ 0.4), hexbin, fastmatch, nlme, xts, bit64
Published: 2014-02-27
Author: M Dowle, T Short, S Lianoglou, A Srinivasan with contributions from R Saporta, E Antonyan
Maintainer: Matt Dowle <mdowle at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: yes
Materials: NEWS
In views: Finance, HighPerformanceComputing
CRAN checks: data.table results


Reference manual: data.table.pdf
Vignettes: Frequently asked questions
Quick introduction
Timings of common tasks
Package source: data.table_1.9.2.tar.gz
OS X binary: data.table_1.9.2.tgz
Windows binary:
Old sources: data.table archive

Reverse dependencies:

Reverse depends: CAGExploreR, GPFDA, greport, psidR, Rbitcoin, RecordLinkage, SciencesPo, sdcMicro, sdcTable, splitstackshape, survMisc, ttwa
Reverse imports: aLFQ, benford.analysis, Causata, DataCombine, ecoengine, edmr, eeptools, FAOSTAT, freqweights, gems, IAT, Kmisc, lllcrc, randomNames, RAPIDR, rbison, rfisheries, rgauges, rgbif, rnoaa, SGP, simPH, spocc, sweSCB, taxize, treebase, treemap
Reverse suggests: dplyr, installr, Lahman, ProjectTemplate