fastmatrix (version 0.5-7721)

vec: Vectorization of a matrix

Description

This function returns a vector obtained by stacking the columns of \(\bold{X}\).

Usage

vec(x)

Value

Let \(\bold{X}\) be a \(n\) by \(m\) matrix, then vec(\(\bold{X}\)) is a \(nm\)-dimensional vector.

Arguments

x

a numeric matrix.

Examples

x <- matrix(rep(1:10, each = 10), ncol = 10)
x
y <- vec(x)
y