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  <refnamediv>
    <refname>idct1</refname>
    <refpurpose>Compute the inverse discrete cosine transform.</refpurpose>
  </refnamediv>


<refsynopsisdiv>
   <title>Syntax</title>
   <synopsis>
   Y = idct1(X)
   Y = idct1(X, N)
   
   </synopsis>
</refsynopsisdiv>

<refsection>
   <title>Parameters</title>
   <variablelist>
        <varlistentry>
            <term>X:</term>
            <listitem><para> Input matrix or integer.</para></listitem>
        </varlistentry>
        <varlistentry>
            <term>N:</term>
            <listitem><para> (optional) If N is given, X is padded or trimmed to length N before computing the transform.</para></listitem>
        </varlistentry>
   </variablelist>
</refsection>

<refsection>
   <title>Description</title>
   <para>
Computes the inverse discrete cosine transform of input X. If X is a matrix, the transform is computed along the columns of the matrix. The transform is faster if X is real-valued and of even length.
   </para>
   <para>
</para>
</refsection>

<refsection>
   <title>Examples</title>
   <programlisting role="example"><![CDATA[
idct1([1, 3, 6])

   ]]></programlisting>
</refsection>
</refentry>
