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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<TITLE>ISEMPTY Test For Variable Empty
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<H2>ISEMPTY Test For Variable Empty
</H2>
<P>
Section: <A HREF=sec_inspection.html> Inspection Functions </A>
<H3>Usage</H3>
The <code>isempty</code> function returns a boolean that indicates
if the argument variable is empty or not. The general
syntax for its use is
<PRE>
y = isempty(x).
</PRE>
<P>
<H3>Examples</H3>
Here are some examples of the <code>isempty</code> function
<PRE>
--> a = []
a =
[]
--> isempty(a)
ans =
1
--> b = 1:3
b =
1 2 3
--> isempty(b)
ans =
0
</PRE>
<P>
Note that if the variable is not defined, <code>isempty</code>
does not return true.
<PRE>
--> clear x
--> isempty(x)
Error: Undefined function or variable x
</PRE>
<P>
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