coldiffs: Column-wise differences

View source: R/coldiffs.R

Column-wise differencesR Documentation

Column-wise differences

Description

Column-wise differences.

Usage

coldiffs(x)

Arguments

x

A matrix with numbers.

Details

This function simply does this function x[, -1] - x[, -k], where k is the last column of the matrix x. But it does it a lot faster. That is, 2nd column - 1st column, 3rd column - 2nd column, and so on.

Value

A matrix with one column less containing the differences between the successive columns.

Author(s)

Manos Papadakis

R implementation and documentation: Manos Papadakis <papadakm95@gmail.com>.

See Also

Dist, dista, colmeans

Examples

x <- matrix( rnorm(50 * 10), ncol = 10 )
res<-coldiffs(x)

x<-NULL

Rfast documentation built on March 18, 2022, 7:41 p.m.