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<TITLE>ISINF Test for infinities
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<H2>ISINF Test for infinities
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<P>
Section: <A HREF=sec_inspection.html> Inspection Functions </A>
<H3>Usage</H3>
Returns true for entries of an array that are infs (i.e.,
infinities). The usage is
<PRE>
y = isinf(x)
</PRE>
<P>
The result is a logical array of the same size as <code>x</code>,
which is true if <code>x</code> is not-a-number, and false otherwise.
Note that for <code>complex</code> or <code>dcomplex</code> data types that
the result is true if either the real or imaginary parts
are infinite.
<H3>Example</H3>
Suppose we have an array of floats with one element that
is <code>inf</code>:
<PRE>
--> a = [1.2 3.4 inf 5]
a =
1.2000 3.4000 Inf 5.0000
--> isinf(a)
ans =
0 0 1 0
--> b = 3./[2 5 0 3 1]
b =
1.5000 0.6000 Inf 1.0000 3.0000
</PRE>
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