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data.table (version 1.12.6)

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

999,142

Version

1.12.6

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

Last Published

October 18th, 2019

Functions in data.table (1.12.6)

Coalescing missing values

Faster match of character vectors

Fast overlap joins

Determine Duplicate Rows

dcast.data.table

Fast dcast for data.table

datatable.optimize

Optimisations in data.table

Convenience functions for range subsets.

data.table-package

Enhanced data.frame

Convenience function for calling grep.

melt.data.table

Fast melt for data.table

Number of rows affected by last update

First/last item of an object

Obtain matching indices corresponding to patterns

print.data.table

data.table Printing Options

Grouping Set aggregation for data tables

Fast CSV writer

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

Generate unique row ids within each group

Fast lead/lag for vectors and lists

Coerce a data.table to data.frame by reference

Fast and friendly file finagler

Makes one data.table from a list of many

Merge two data.tables

Copy an entire object

Generate run-length type group id

na.omit.data.table

Remove rows with missing values on columns specified

Create key on a data.table

Fast column reordering of a data.table by reference

Display 'data.table' metadata

subset.data.table

Subsetting data.tables

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

special-symbols

Special symbols

Split data.table into chunks in a list

data.table-class

S4 Definition for data.table

Rolling functions

Fast parallel sort

setNumericRounding

Change or turn off numeric rounding

Set attributes of objects by reference

Test assertions for equality, exceptions and console output

test.data.table

Runs a set of tests.

Fast row reordering of a data.table by reference

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

Set operations for data tables

Fill missing values

Over-allocation access

Efficient transpose of list

transform.data.table

Data table utilities

Pretty print of time taken

strsplit and transpose the resulting list efficiently

Perform update of development version of a package

as.xts.data.table

Efficient data.table to xts conversion

Equality Test Between Two Data Tables

Coerce to data.table

Integer based date class

Address in RAM of a variable

Assignment by reference

as.data.table.xts

Efficient xts to as.data.table conversion

Creates a join data.table

Convert a data.table to a matrix