Title: Just like a data.frame but without rownames, up to 10 times faster, up to 10 times less memory
Description: This package does very little. The only reason for its existence is that the white book specifies that data.frame must have rownames. This package defines a new class data.table which operates just like a data.frame, but uses up to 10 times less memory, and can be up to 10 times faster to create (and copy). It also takes the opportunity to allow subset() and with() like expressions inside the []. Most of the code is copied from base functions with the code manipulating row.names removed.
Packaged: Thu Apr 13 18:50:34 2006; matthew

Title: Extension of data.frame to allow i and j to be expressions of column names.
Description: Like a data.frame but i and j may be expressions evaluated within the frame. i is then like base::with and j like select in base::subset. When i is itself a data.table, a join is invoked similar to base::merge.
Packaged: Wed Aug 27 04:02:47 2008; mdowle

Suggests: bit64, knitr, chron, ggplot2 (>= 0.9.0), plyr, reshape,
reshape2, testthat (>= 0.4), hexbin, fastmatch, nlme, xts,
gdata, GenomicRanges, caret, curl, zoo, plm, rmarkdown,
Description: 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, a fast friendly file reader and parallel file writer. Offers a natural and flexible syntax, for faster development.

Suggests: bit64, knitr, nanotime, chron, ggplot2 (>= 0.9.0), plyr,
reshape, reshape2, testthat (>= 0.4), hexbin, fastmatch, nlme,
xts, gdata, GenomicRanges, caret, curl, zoo, plm, rmarkdown,

Suggests: bit64, curl, knitr, xts, nanotime, zoo, chron, reshape2,
Description: 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, friendly and fast character-separated-value read/write. Offers a natural and flexible syntax, for faster development.

Suggests: bit64, curl, knitr, xts, nanotime, zoo, reshape2, testthat