\section{ISNUMERIC Test for Numeric Array}

\subsection{Usage}

The syntax for \verb|isnumeric| is
\begin{verbatim}
  x = isnumeric(y)
\end{verbatim}
and it returns a logical 1 if the argument is a numeric
(i.e., not a structure array, cell array, string or user
defined class), and a logical 0 otherwise.
