Learn R Programming

⚠️There's a newer version (1.17.0) of this package.Take me there.

data.table (version 1.8.0)

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.

Copy Link

Version

Install

install.packages('data.table')

Monthly Downloads

1,037,494

Version

1.8.0

License

GPL (>= 2)

Homepage

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

Maintainer

M Dowle and T Short

Last Published

July 16th, 2012

Functions in data.table (1.8.0)

Integer based date class

Display all objects of class 'data.table'

Determine Duplicate Rows

Enhanced data.frame

Faster match of character vectors

Merge Two Data Tables

data.table-class

S4 Definition for data.table

Convenience function for range subset logic.

Convenience function for calling regexpr.

Pretty print of time taken

Last item of an object

Over-allocation access

Creates a Join data table

subset.data.table

Subsetting data.tables

test.data.table

Runs a set of tests.

Equality Test Between Two Data Tables

Create key on a data table

Assignment by reference

transform.data.table

Data table utilities