[R-pkgs] data.table 1.4.1 now on CRAN
mdowle at mdowle.plus.com
Thu May 6 20:15:36 CEST 2010
data.table is an enhanced data.frame with fast subset, fast
grouping and fast merge. It uses a short and flexible syntax
which extends existing R concepts.
where DT is a data.table with 4 columns (a,b,c,d).
data.table 1.4.1 :
* grouping is now 10+ times faster than tapply()
* extract is 100+ times faster than ==, as before
* 3 new vignettes: Intro, FAQ & Timings
* NEWS file contains further details
There is a new mailing list, datatable-help. Please do send comments,
feedback, problems and questions.
Matthew and Tom
More information about the R-packages