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data.table (version 1.2)

Extension of data.frame. i and j expressions, keys and binary search.

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 but uses binary search on the sorted key.

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Version

Install

install.packages('data.table')

Monthly Downloads

847,543

Version

1.2

License

GPL

Maintainer

M Dowle

Last Published

June 17th, 2025

Functions in data.table (1.2)

J

Creates a Join data table
tables

Display all objects of class 'data.table'
like

Convenience function for calling regexpr.
last

Last item of an object
setkey

Create key on a data table
data.table

Enhanced data.frame
test.data.table

Runs a set of tests.
Extract.data.table

Query a data table
between

Convenience function for range subset logic.