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data.table (version 1.9.2)

Extension of data.frame

Description

Fast aggregation of large data (e.g. 100GB in RAM), fast ordered joins, fast add/modify/delete of columns by group using no copies at all, list columns and a fast file reader (fread). Offers a natural and flexible syntax, for faster development.

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Version

Install

install.packages('data.table')

Monthly Downloads

847,543

Version

1.9.2

License

GPL (>= 2)

Maintainer

M Dowle

Last Published

February 27th, 2014

Functions in data.table (1.9.2)

IDateTime

Integer based date class
test.data.table

Runs a set of tests.
chmatch

Faster match of character vectors
J

Creates a Join data table
tables

Display all objects of class 'data.table'
subset.data.table

Subsetting data.tables
timetaken

Pretty print of time taken
last

Last item of an object
all.equal

Equality Test Between Two Data Tables
dcast.data.table

Fast dcast for data.table
merge

Merge Two Data Tables
transform.data.table

Data table utilities
rbindlist

Makes one data.table from a list of many
data.table-class

S4 Definition for data.table
data.table-package

Enhanced data.frame
fread

Fast and friendly file finagler
address

Address in RAM of a variable
between

Convenience function for range subset logic.
:=

Assignment by reference
like

Convenience function for calling regexpr.
melt.data.table

Fast melt for data.table
duplicated

Determine Duplicate Rows
truelength

Over-allocation access
setkey

Create key on a data table