Rfast (version 1.3)

Sorting of the columns of a matrix : Sorting of the columns of a matrix .

Description

Fast sorting of the columns of a matrix .

Usage

sort_mat(x)

Arguments

x

A numerical matrix with data.

Value

The matrix with its columns independently sorted.

See Also

nth, colMaxs, colMins

Examples

x <- matrix( rnorm(1000 * 20), ncol = 20 )
system.time( s1 <- sort_mat(x) )
system.time( s2 <- apply(x, 2, sort)  )
all.equal(as.vector(s1), as.vector(s2))