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data.table (version 1.7.2)

Extension of data.frame for fast indexing, fast ordered joins, fast assignment, fast grouping and list columns.

Description

Enhanced data.frame. Fast indexing, fast ordered joins, fast assignment, fast grouping and list columns 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

1,453,211

Version

1.7.2

License

GPL (>= 2)

Homepage

http://datatable.r-forge.r-project.org/

Maintainer

M Dowle and T Short

Last Published

November 7th, 2011

Functions in data.table (1.7.2)

Enhanced data.frame

Convenience function for range subset logic.

Creates a Join data table

Determine Duplicate Rows

Last item of an object

test.data.table

Runs a set of tests.

Merge Two Data Tables

Integer based date class

Pretty print of time taken

Display all objects of class 'data.table'

Equality Test Between Two Data Tables

Create key on a data table

Convenience function for calling regexpr.

transform.data.table

Data table utilities

data.table-class

S4 Definition for data.table

subset.data.table

Subsetting data.tables