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<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* This help file was generated from fftfilt.sci using help_from_sci().
*
-->
<refentry version="5.0-subset Scilab" xml:id="fftfilt" 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>fftfilt</refname>
<refpurpose>Performs FFT-based FIR filtering using overlap-add method</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>
</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parameters</title>
<variablelist>
<varlistentry><term>x:</term>
<listitem><para> real|complex numbers - vector|matrix</para></listitem></varlistentry>
<varlistentry><term>b:</term>
<listitem><para> real|complex numbers - vector|matrix</para></listitem></varlistentry>
<varlistentry><term>n:</term>
<listitem><para> positive integer</para></listitem></varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>
y = fftfilt(b,x) filters the data in vector x with the filter described
by coefficient vector b.
y = fftfilt(b,x,n) uses n to determine the length of the FFT.
</para>
<para>
</para>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
1) Filtering a sine wave
x = sin(1:2000);
b = [1 1/2];
y = fftfilt(b,x);
2) Multiple filters (1,1/3) and (1/4,1/5);
x = sin(1:2000);
b = [1 1/4;1/3 1/5];
y = fftfilt(b,x);
]]></programlisting>
</refsection>
<refsection>
<title>Authors</title>
<simplelist type="vert">
<member>Ayush Baid</member>
</simplelist>
</refsection>
</refentry>
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