Name
vech — stacks a symmetric matrix
CALLING SEQUENCE
[v]=vech(x)
PARAMETERS
- Input
x = an input matrix
- Output
v = output vector containing stacked columns of x
DESCRIPTION
Creates a column vector by stacking columns of x on and below the diagonal
EXAMPLE
vech([1 0.5; 0.5 2]')
//returns:
//! 1. !
//! .5 !
//! 2. !