fastmatrix (version 0.5-7721)

vec: Vectorization of a matrix

Description

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

Usage

vec(x)

Value

Let $\text{bold}X$ be a $n$ by $m$ matrix, then vec($\text{bold}X$) 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