data.table (1.6)

Extension of data.frame for fast indexing, fast ordered joins and fast grouping..

http://datatable.r-forge.r-project.org/
http://rwiki.sciviews.org/doku.php?id=packages:cran:data.table
http://cran.r-project.org/web/packages/data.table

Enhanced data.frame. Fast indexing, fast ordered joins and fast grouping in a short and flexible syntax. i and j may be expressions of column names directly, for faster development. Example: X[Y] is a fast join for large data.

Maintainer: Developers
Author(s): Matthew Dowle with many contributions from Tom Short. See SVN logs on R-Forge.

License: GPL

Uses: chron, ggplot2, testthat
Reverse depends: FAOSTAT, postgwas, randomNames, RecordLinkage, SGP, survMisc, tabplot, treemap
Reverse suggests: Lahman, pcrsim, ProjectTemplate

Released about 2 years ago.

data.table (1.6)

crantastic!