\section{NUM2STR Convert Numbers To Strings}

\subsection{Usage}

Converts an array into its string representation.  The general syntax
for this function is
\begin{verbatim}
   s = num2str(X)
\end{verbatim}
where \verb|s| is a string (or string matrix) and \verb|X| is an array.  By
default, the \verb|num2str| function uses 4 digits of precision and an 
exponent if required.  If you want more digits of precision, you can 
specify the precition via the form
\begin{verbatim}
   s = num2str(X, precision)
\end{verbatim}
where \verb|precision| is the number of digits to include in the string
representation.  For more control over the format of the output, you 
can also specify a format specifier (see \verb|printf| for more details).
\begin{verbatim}
   s = num2str(X, format)
\end{verbatim}
where \verb|format| is the specifier string.
