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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<TITLE>ISSPARSE Test for Sparse Matrix
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<BODY>
<H2>ISSPARSE Test for Sparse Matrix
</H2>
<P>
Section: <A HREF=sec_inspection.html> Inspection Functions </A>
<H3>Usage</H3>
Test a matrix to see if it is sparse or not. The general
format for its use is
<PRE>
y = issparse(x)
</PRE>
<P>
This function returns true if <code>x</code> is encoded as a sparse
matrix, and false otherwise.
<H3>Example</H3>
Here is an example of using <code>issparse</code>:
<PRE>
--> a = [1,0,0,5;0,3,2,0]
a =
1 0 0 5
0 3 2 0
--> issparse(a)
ans =
0
--> A = sparse(a)
A =
1 1 1
2 2 3
2 3 2
1 4 5
--> issparse(A)
ans =
1
</PRE>
<P>
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