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<?xml version="1.0" encoding="UTF-8"?>
<!--
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) XXXX-2008 - INRIA
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
-->
<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" version="5.0-subset Scilab" xml:lang="en" xml:id="nnz">
<info>
<pubdate>$LastChangedDate$</pubdate>
</info>
<refnamediv>
<refname>nnz</refname>
<refpurpose> number of non zero entries in a matrix</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>n=nnz(X)</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term>X</term>
<listitem>
<para>real or complex sparse (or full) matrix</para>
</listitem>
</varlistentry>
<varlistentry>
<term>n</term>
<listitem>
<para>integer, the number of non zero elements in X</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para><literal>nnz</literal> counts the number of non zero entries in a sparse or full matrix</para>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
sp=sparse([1,2;4,5;3,10],[1,2,3]);
nnz(sp)
a=[1 0 0 0 2];
nnz(a)
]]></programlisting>
</refsection>
<refsection>
<title>See Also</title>
<simplelist type="inline">
<member>
<link linkend="spget">spget</link>
</member>
</simplelist>
</refsection>
</refentry>
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