data.table v1.5.3

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by M Dowle

Extension of data.frame for fast subset, fast merge and fast grouping.

Enhanced data.frame. Fast subset, grouping and merge 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.

Functions in data.table

Name Description
setkey Create key on a data table
test.data.table Runs a set of tests.
between Convenience function for range subset logic.
merge Merge Two Data Tables
duplicated Determine Duplicate Rows
timetaken Pretty print of time taken
like Convenience function for calling regexpr.
data.table Enhanced data.frame
J Creates a Join data table
transform.data.table Data table utilities
IDateTime Integer based date class
last Last item of an object
tables Display all objects of class 'data.table'
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Details

License GPL
URL http://datatable.r-forge.r-project.org/, http://rwiki.sciviews.org/doku.php?id=packages:cran:data.table
Packaged 2011-02-11 00:35:36 UTC; mdowle
Repository CRAN
Date/Publication 2011-02-11 08:49:05

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