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data.table (version 1.6.3)

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

Description

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

1.6.3

License

GPL

Homepage

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

Maintainer

M Dowle and T Short

Last Published

August 4th, 2011

Functions in data.table (1.6.3)

Creates a Join data table

all.equal

Equality Test Between Two Data Tables

Convenience function for calling regexpr.

tables

Display all objects of class 'data.table'

between

Convenience function for range subset logic.

data.table-class

S4 Definition for data.table

duplicated

Determine Duplicate Rows

transform.data.table

Data table utilities

last

Last item of an object

setkey

Create key on a data table

IDateTime

Integer based date class

merge

Merge Two Data Tables

timetaken

Pretty print of time taken