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<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* This help file was generated from filternorm.sci using help_from_sci().
*
-->
<refentry version="5.0-subset Scilab" xml:id="filternorm" 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>filternorm</refname>
<refpurpose>Calculates the L-2 norm or L-infinity norm of a digital filter</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>
L = filternorm(b,a)
L = filternorm(b,a,pnorm)
L = filternorm(b,a,2,tol)
</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parameters</title>
<variablelist>
<varlistentry><term>b:</term>
<listitem><para> The filter numerator coefficients.</para></listitem></varlistentry>
<varlistentry><term>a:</term>
<listitem><para> The filter denominator coefficients.</para></listitem></varlistentry>
<varlistentry><term>pnorm:</term>
<listitem><para> The L-norm to be calculated. The values accepted are 2 (L2 norm) or %inf (L-infinity norm). Default value is 2.</para></listitem></varlistentry>
<varlistentry><term>tol:</term>
<listitem><para> The tolerance of the L-2 norm to be calculated. If tol not specified, it defaults to 10^(-8). tol must be a positive scalar</para></listitem></varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
// 1) L-2 norm of an IIR filter with tol = 10^(-10)
b = [-3 2];
a = [1 -0.5];
L = filternorm(b, a, 2, 10d-10);
]]></programlisting>
</refsection>
<refsection>
<title>See also</title>
<simplelist type="inline">
<member><link linkend="norm">norm</link></member>
<member><link linkend="zp2sos">zp2sos</link></member>
</simplelist>
</refsection>
<refsection>
<title>Authors</title>
<simplelist type="vert">
<member>Ayush Baid</member>
</simplelist>
</refsection>
</refentry>
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