Learn R Programming

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

data.table (version 1.13.0)

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, friendly and fast character-separated-value read/write. Offers a natural and flexible syntax, for faster development.

Copy Link

Version

Install

install.packages('data.table')

Monthly Downloads

847,543

Version

1.13.0

License

MPL-2.0 | file LICENSE

Issues

Pull Requests

Stars

Forks

Repository

https://github.com/Rdatatable/data.table

Homepage

http://r-datatable.com

Maintainer

Matt Dowle

Last Published

July 24th, 2020

Functions in data.table (1.13.0)

Convenience functions for range subsets.

data.table-package

Enhanced data.frame

Faster match of character vectors

data.table exported C routines

data.table-class

S4 Definition for data.table

datatable.optimize

Optimisations in data.table

Determine Duplicate Rows

dcast.data.table

Fast dcast for data.table

Fast parallel sort

Coalescing missing values

Copy an entire object

Fast CSV writer

Fast and friendly file finagler

print.data.table

data.table Printing Options

Makes one data.table from a list of many

Rolling functions

Obtain matching indices corresponding to patterns

Fast overlap joins

Grouping Set aggregation for data tables

Set or get number of threads that data.table should use

melt.data.table

Fast melt for data.table

Fast column reordering of a data.table by reference

Create key on a data.table

Number of rows affected by last update

Convenience function for calling grep.

Merge two data.tables

Coerce a data.table to data.frame by reference

Pretty print of time taken

transform.data.table

Data table utilities

Set operations for data tables

setNumericRounding

Change or turn off numeric rounding

subset.data.table

Subsetting data.tables

Set attributes of objects by reference

Efficient transpose of list

Over-allocation access

Test assertions for equality, exceptions and console output

Generate unique row ids within each group

Coerce lists and data.frames to data.table by reference

For use by packages that mimic/divert auto printing e.g. IRkernel and knitr

na.omit.data.table

Remove rows with missing values on columns specified

Fill missing values

First/last item of an object

Fast row reordering of a data.table by reference

Split data.table into chunks in a list

Display 'data.table' metadata

Generate run-length type group id

test.data.table

Runs a set of tests.

Fast lead/lag for vectors and lists

special-symbols

Special symbols

strsplit and transpose the resulting list efficiently

Perform update of development version of a package

Assignment by reference

Convert a data.table to a matrix

Address in RAM of a variable

Creates a join data.table

Integer based date class

as.xts.data.table

Efficient data.table to xts conversion

as.data.table.xts

Efficient xts to as.data.table conversion

Coerce to data.table

Equality Test Between Two Data Tables