gamlr (version 0.1)

normalize: Normalize

Description

Normalize matrix columns.

Usage

normalize(x, m=NULL, s=sdev(x))

Arguments

x

A matrix.

m

Optional column shifts.

s

Column scaling factor (we divide by s).

Value

• If x is a matrix, the default returns mean-zero and variance-one columns. If x is a simple_triplet_matrix, columns are scaled by sdev(x) but left unshifted; the function returns a simple_triplet_matrix. If shift and scale are specified AND x is a matrix, columns are shifted by -m and divided by s.

Examples

x <- matrix(1:9, ncol=3)
normalize( x )
as.matrix(normalize(as.simple_triplet_matrix(x)))