\section{PVALID Validate Property Name}

\subsection{Usage}

This function checks to see if the given string is a valid
property name for an object of the given type.  The syntax
for its use is
\begin{verbatim}
  b = pvalid(type,propertyname)
\end{verbatim}
where \verb|string| is a string that contains the name of a 
 valid graphics object type, and
\verb|propertyname| is a string that contains the name of the
property to test for.
\subsection{Example}

Here we test for some properties on an \verb|axes| object.
\begin{verbatim}
--> pvalid('axes','type')
ans = 
  <logical>  - size: [1 1]
 1  
--> pvalid('axes','children')
ans = 
  <logical>  - size: [1 1]
 1  
--> pvalid('axes','foobar')
ans = 
  <logical>  - size: [1 1]
 0  

\end{verbatim}
