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<A NAME=matrixp>

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<B>MATRIXP</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
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syntax: </H3>
<em>matrixp</em>(&lt;test\_input&gt;) 
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&lt;test\_input&gt; :- anything you like. 
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<em>matrixp</em>is a boolean function that returns t if the input is a 
matrix and nil otherwise. 
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examples: </H3>
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matrixp A; 

  t 


matrixp(doodlesackbanana);

  nil 

</TT></PRE><P>Related functions: 
<A HREF=r37_0613.html>squarep</A>, 
<A HREF=r37_0620.html>symmetricp</A>. 
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