\section{VEC Reshape to a Vector}

\subsection{Usage}

Reshapes an n-dimensional array into a column vector.  The general
syntax for its use is
\begin{verbatim}
   y = vec(x)
\end{verbatim}
where \verb|x| is an n-dimensional array (not necessarily numeric).  This
function is equivalent to the expression \verb|y = x(:)|.
\subsection{Example}

A simple example of the \verb|vec| operator reshaping a 2D matrix:
\begin{verbatim}
--> A = [1,2,4,3;2,3,4,5]

A = 

 1 2 4 3 
 2 3 4 5 

--> vec(A)

ans = 

 1 
 2 
 2 
 3 
 4 
 4 
 3 
 5 


\end{verbatim}
