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<refentry xml:id="zak" xml:lang="en"
          xmlns="http://docbook.org/ns/docbook"
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  <refnamediv>
    <refname>zak</refname><refpurpose>Zak transform.</refpurpose>
  </refnamediv>



<refsynopsisdiv>
   <title>Calling Sequence</title>
   <synopsis>
   	DZT=zak(SIG,N,M)
   </synopsis>
</refsynopsisdiv>

<refsection>
   <title>Parameters</title>
   <variablelist>
   <varlistentry><term>	SIG :</term>
      <listitem><para> Signal to be analysed (length(X)=N1).</para></listitem></varlistentry>
   <varlistentry><term>	N   :</term>
      <listitem><para> number of Zak coefficients in time (N1 must be a multiple of N)          (default : closest integer towards sqrt(N1)).</para></listitem></varlistentry>
   <varlistentry><term>	M   :</term>
      <listitem><para> number of Zak coefficients in frequency (N1 must be a    multiple of M) (default : M=N1/N).</para></listitem></varlistentry>
   <varlistentry><term>	DZT :</term>
      <listitem><para> Output matrix (N,M) containing the discrete Zak transform.</para></listitem></varlistentry>
   </variablelist>
</refsection>

<refsection>
   <title>Description</title>
   <para>
zak computes the Zak transform of signal SIG.
</para>
</refsection>

<refsection>
   <title>Examples</title>
   <programlisting role="example"><![CDATA[
sig=fmlin(256); DZT=zak(sig);
grayplot(1:16,1:16,DZT');
   ]]></programlisting>
</refsection>

<refsection>
   <title>See also</title>
   <simplelist type="inline">
   <member><link linkend="izak">izak</link></member>
   <member><link linkend="tfrgabor">tfrgabor</link></member>
   </simplelist>
</refsection>

<refsection>
   <title>Authors</title>
   <simplelist type="vert">
   <member>H. Nahrstaedt - Aug 2010</member>
   <member>	O. Lemoine - February 1996.</member>
   <member>	Copyright (c) 1996 by CNRS (France).</member>
   </simplelist>
</refsection>
</refentry>
