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+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+ *
+ * This help file was generated from filtfilt.sci using help_from_sci().
+ *
+ -->
+
+<refentry version="5.0-subset Scilab" xml:id="filtfilt" xml:lang="en"
+          xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink"
+          xmlns:svg="http://www.w3.org/2000/svg"
+          xmlns:ns3="http://www.w3.org/1999/xhtml"
+          xmlns:mml="http://www.w3.org/1998/Math/MathML"
+          xmlns:scilab="http://www.scilab.org"
+          xmlns:db="http://docbook.org/ns/docbook">
+
+  <refnamediv>
+    <refname>filtfilt</refname>
+    <refpurpose></refpurpose>
+  </refnamediv>
+
+
+<refsynopsisdiv>
+   <title>Calling Sequence</title>
+   <synopsis>
+   [y]=filtfilt(b,a,x)
+   </synopsis>
+</refsynopsisdiv>
+
+<refsection>
+   <title>Parameters</title>
+   <variablelist>
+   <varlistentry><term>b:</term>
+      <listitem><para> Real or complex valued vector or matrix</para></listitem></varlistentry>
+   <varlistentry><term>a:</term>
+      <listitem><para> Real or complex valued vector or matrix</para></listitem></varlistentry>
+   <varlistentry><term>x:</term>
+      <listitem><para> Real or complex valued vector or matrix</para></listitem></varlistentry>
+   </variablelist>
+</refsection>
+
+<refsection>
+   <title>Description</title>
+   <para>
+This is an Octave function
+In theory, it forwards and reverse filters the signal and corrects phase distortion upto an extent by a one-pass filter but squares the magnitude response in the process. Practically though, the correction isn't perfect and magnitude response, particularly the stop band is distorted.
+</para>
+</refsection>
+
+<refsection>
+   <title>Examples</title>
+   <programlisting role="example"><![CDATA[
+1.    [a,b]=filtfilt (1,2i,[i -4 0])
+a =   [0.00000 - 0.25000i   1.00000 + 0.00000i   0.00000 + 0.00000i]
+   ]]></programlisting>
+</refsection>
+</refentry>