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data.table (version 1.5.3)

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

Description

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.

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Version

Install

install.packages('data.table')

Monthly Downloads

847,543

Version

1.5.3

License

GPL

Maintainer

M Dowle

Last Published

February 11th, 2011

Functions in data.table (1.5.3)

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'