vec, vecr

Purpose

Creates a column vector by appending the columns/rows of a matrix to each other.

Format

yc = vec(x)

yc = vecr(x)

Parameters:

x (NxK matrix) – data

Returns:

• yc ((N*K)x1 vector) – the columns of x appended to each other.
• yr ((N*K)x1 vector) – the rows of x appended to each other and the result transposed.

Examples

x = { 1 2,
      3 4 };
yc = vec(x);
yr = vecr(x);

The code above assigns the variables yc and yr:

     1       1
yc = 3  yr = 2
     2       3
     4       4

Remarks

vecr() is much faster.