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data.table (version 1.12.4)

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

971,635

Version

1.12.4

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

October 3rd, 2019

Functions in data.table (1.12.4)

Creates a join data.table

dcast.data.table

Fast dcast for data.table

Determine Duplicate Rows

Coalescing missing values

Fast overlap joins

data.table-class

S4 Definition for data.table

Copy an entire object

Faster match of character vectors

data.table-package

Enhanced data.frame

datatable.optimize

Optimisations in data.table

Convenience function for calling grep.

Rolling functions

Merge two data.tables

Fast parallel sort

na.omit.data.table

Remove rows with missing values on columns specified

First/last item of an object

Number of rows affected by last update

Generate unique row ids within each group

melt.data.table

Fast melt for data.table

Fast column reordering of a data.table by reference

setNumericRounding

Change or turn off numeric rounding

Fast lead/lag for vectors and lists

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

Fast CSV writer

Grouping Set aggregation for data tables

strsplit and transpose the resulting list efficiently

Pretty print of time taken

transform.data.table

Data table utilities

Fill missing values

Perform update of development version of a package

Set attributes of objects by reference

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

Create key on a data.table

special-symbols

Special symbols

Fast row reordering of a data.table by reference

test.data.table

Runs a set of tests.

Test assertions for equality, exceptions and console output

Set operations for data tables

Display 'data.table' metadata

subset.data.table

Subsetting data.tables

Obtain matching indices corresponding to patterns

print.data.table

data.table Printing Options

Split data.table into chunks in a list

Makes one data.table from a list of many

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

Generate run-length type group id

Coerce a data.table to data.frame by reference

Fast and friendly file finagler

Over-allocation access

Efficient transpose of list

Integer based date class

Address in RAM of a variable

Equality Test Between Two Data Tables

Coerce to data.table

as.data.table.xts

Efficient xts to as.data.table conversion

Convenience functions for range subsets.

Assignment by reference

Convert a data.table to a matrix

as.xts.data.table

Efficient data.table to xts conversion