as.data.table

as.data.frame.data.table

as.data.table.data.frame

as.data.table.data.table

as.data.table.matrix

as.matrix.data.table

cbind.data.table

[<-.data.table

[.data.table

dim.data.table

dimnames<-.data.table

dimnames.data.table

head.data.table

is.data.table

NCOL

NROW

print.data.table

rbind.data.table

subset.data.table

tail.data.table

These are largely direct copies of the base functions for data.frame with the code manipulating row.names removed.

data

This package does very little. The only reason for its existence is that the white book specifies that data.frame must have rownames. This package defines a new class data.table which operates just like a data.frame, but uses up to 10 times less memory, and can be up to 10 times faster to create (and copy). It also takes the opportunity to allow subset() and with() like expressions inside the []. Most of the code is copied from base functions with the code manipulating row.names removed.

Matt Dowle

data.table

Just like a data.frame but without rownames, up to 10 times faster, up to 10 times less memory

dt function

data.table support functions

dt: data.table support functions

Description

Arguments

Value

Details

See Also