<?xml version="1.0" encoding="UTF-8"?>
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 * Scilab ( https://www.scilab.org/ ) - This file is part of Scilab
 * Copyright (C) 2008 - INRIA
 *
 * Copyright (C) 2012 - 2016 - Scilab Enterprises
 *
 * This file is hereby licensed under the terms of the GNU GPL v2.0,
 * pursuant to article 5.3.4 of the CeCILL v.2.1.
 * This file was originally licensed under the terms of the CeCILL v2.1,
 * and continues to be available under such terms.
 * For more information, see the COPYING file which you should have received
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<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" xmlns:scilab="http://www.scilab.org" xml:lang="en" xml:id="coff">
    <refnamediv>
        <refname>coff</refname>
        <refpurpose>resolvent (cofactor method)  </refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>Syntax</title>
        <synopsis>[N,d]=coff(M [,var])</synopsis>
    </refsynopsisdiv>
    <refsection>
        <title>Arguments</title>
        <variablelist>
            <varlistentry>
                <term>M</term>
                <listitem>
                    <para>square real matrix</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>var</term>
                <listitem>
                    <para>character string</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>N</term>
                <listitem>
                    <para>
                        polynomial matrix (same size as <literal>M</literal>)
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>d</term>
                <listitem>
                    <para>
                        polynomial (characteristic polynomial <literal>poly(A,'s')</literal>)
                    </para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsection>
    <refsection>
        <title>Description</title>
        <para>
            <literal>coff</literal> computes R=<literal>(s*eye()-M)^-1</literal> for <literal>M</literal> a real matrix.
            R is given by <literal>N/d</literal>.
        </para>
        <para>
            <literal>N</literal> = numerator polynomial matrix.
        </para>
        <para>
            <literal>d</literal> = common denominator.
        </para>
        <para>
            <literal>var</literal> character string ('<literal>s</literal>' if omitted)
        </para>
    </refsection>
    <refsection>
        <title>Examples</title>
        <programlisting role="example"><![CDATA[
M=[1,2;0,3];
[N,d]=coff(M)
N/d
inv(%s*eye(2,2)-M)
 ]]></programlisting>
    </refsection>
    <refsection role="see also">
        <title>See also</title>
        <simplelist type="inline">
            <member>
                <link linkend="coffg">coffg</link>
            </member>
            <member>
                <link linkend="ss2tf">ss2tf</link>
            </member>
            <member>
                <link linkend="nlev">nlev</link>
            </member>
            <member>
                <link linkend="poly">poly</link>
            </member>
        </simplelist>
    </refsection>
</refentry>
