Learn R Programming
⚠️There's a newer version (1.17.6) of this package.Take me there.

data.table (version 1.7.9)

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

815,805

Version

1.7.9

License

GPL (>= 2)

Maintainer

M Dowle and T Short

Last Published

January 31st, 2012

Functions in data.table (1.7.9)

duplicated

Determine Duplicate Rows
between

Convenience function for range subset logic.
J

Creates a Join data table
subset.data.table

Subsetting data.tables
timetaken

Pretty print of time taken
truelength

Over-allocation access
like

Convenience function for calling regexpr.
all.equal

Equality Test Between Two Data Tables
tables

Display all objects of class 'data.table'
:=

Assignment by reference
test.data.table

Runs a set of tests.
IDateTime

Integer based date class
transform.data.table

Data table utilities
last

Last item of an object
data.table

Enhanced data.frame
setkey

Create key on a data table
merge

Merge Two Data Tables
data.table-class

S4 Definition for data.table