key&lt;-

This function is deprecated. It will be removed in future. Please use <code>setkey</code>.

internal

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.

Tyson S. Barrett

data.table

Extension of `data.frame`

Tyson Barrett

Matt Dowle

Arun Srinivasan

Jan Gorecki

Michael Chirico

Toby Hocking

Benjamin Schwendinger

Pasha Stetsenko

Tom Short

Steve Lianoglou

Eduard Antonyan

Markus Bonsch

Hugh Parsonage

Scott Ritchie

Kun Ren

Xianying Tan

Rick Saporta

Otto Seiskari

Xianghui Dong

Michel Lang

Watal Iwasaki

Seth Wenchel

Karl Broman

Tobias Schmidt

David Arenburg

Ethan Smith

Francois Cocquemas

Matthieu Gomez

Philippe Chataignon

Nello Blaser

Dmitry Selivanov

Andrey Riabushenko

Cheng Lee

Declan Groves

Daniel Possenriede

Felipe Parages

Denes Toth

Mus Yaramaz-David

Ayappan Perumal

James Sams

Martin Morgan

Michael Quinn

@javrucebo 

@marc-outins 

Roy Storey

Manish Saraswat

Morgan Jacob

Michael Schubmehl

Davis Vaughan

Leonardo Silvestri

Jim Hester

Anthony Damico

Sebastian Freundt

David Simons

Elliott Sales de Andrade

Cole Miller

Jens Peder Meldgaard

Vaclav Tlapak

Kevin Ushey

Dirk Eddelbuettel

Tony Fischetti

Ofek Shilon

Vadim Khotilovich

Hadley Wickham

Bennet Becker

Kyle Haynes

Boniface Christian Kamgang

Olivier Delmarcell

Josh O'Brien

Dereck de Mezquita

Michael Czekanski

Dmitry Shemetov

Nitish Jha

Joshua Wu

Iago Giné-Vázquez

Anirban Chetia

Doris Amoakohene

key&lt;- function

<dl><dt>x</dt>
<dd>Deprecated.</dd></dl>

Arguments

Deprecated. — key&lt;-

<dl>

<dt>x</dt>
<dd>Deprecated.</dd>

</dl>

Deprecated.

key<-: Deprecated.

Description

Usage

Arguments

Examples