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data.table (version 1.12.8)

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.

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Version

Install

install.packages('data.table')

Monthly Downloads

847,543

Version

1.12.8

License

MPL-2.0 | file LICENSE

Issues

Pull Requests

Stars

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Repository

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

Homepage

http://r-datatable.com

Maintainer

Matt Dowle

Last Published

December 9th, 2019

Functions in data.table (1.12.8)

Creates a join data.table

Fast overlap joins

Determine Duplicate Rows

dcast.data.table

Fast dcast for data.table

Faster match of character vectors

Coalescing missing values

data.table-class

S4 Definition for data.table

Copy an entire object

data.table-package

Enhanced data.frame

datatable.optimize

Optimisations in data.table

Fast CSV writer

Grouping Set aggregation for data tables

Rolling functions

Fast parallel sort

Convenience function for calling grep.

melt.data.table

Fast melt for data.table

Obtain matching indices corresponding to patterns

print.data.table

data.table Printing Options

Generate unique row ids within each group

Number of rows affected by last update

First/last item of an object

Makes one data.table from a list of many

Generate run-length type group id

Fast and friendly file finagler

Merge two data.tables

Set attributes of objects by reference

setNumericRounding

Change or turn off numeric rounding

Fast column reordering of a data.table by reference

Create key on a data.table

Coerce a data.table to data.frame by reference

na.omit.data.table

Remove rows with missing values on columns specified

Set operations for data tables

special-symbols

Special symbols

Efficient transpose of list

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

Over-allocation access

Fill missing values

subset.data.table

Subsetting data.tables

Fast row reordering of a data.table by reference

Test assertions for equality, exceptions and console output

Display 'data.table' metadata

test.data.table

Runs a set of tests.

Fast lead/lag for vectors and lists

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

transform.data.table

Data table utilities

Pretty print of time taken

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

Split data.table into chunks in a list

strsplit and transpose the resulting list efficiently

Perform update of development version of a package

Address in RAM of a variable

as.data.table.xts

Efficient xts to as.data.table conversion

Convert a data.table to a matrix

Coerce to data.table

as.xts.data.table

Efficient data.table to xts conversion

Equality Test Between Two Data Tables

Integer based date class

Assignment by reference

Convenience functions for range subsets.