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<?xml version="1.0" encoding="UTF-8"?>
<!--
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) INRIA -
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
*
-->
<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="contrss">
<refnamediv>
<refname>contrss</refname>
<refpurpose>controllable part</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>[slc]=contrss(sl [,tol])</synopsis>
</refsynopsisdiv>
<refsection>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term>sl</term>
<listitem>
<para>
linear system (<literal>syslin</literal> list)
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tol</term>
<listitem>
<para>
is a threshold for controllability (see <literal>contr</literal>). default value is <literal>sqrt(%eps)</literal>.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>
returns the controllable part of the linear
system <literal>sl = (A,B,C,D)</literal> in state-space form.
</para>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
A=[1,1;0,2];B=[1;0];C=[1,1];sl=syslin('c',A,B,C); //Non minimal
slc=contrss(sl);
sl1=ss2tf(sl);sl2=ss2tf(slc); //Compare sl1 and sl2
]]></programlisting>
</refsection>
<refsection role="see also">
<title>See Also</title>
<simplelist type="inline">
<member>
<link linkend="cont_mat">cont_mat</link>
</member>
<member>
<link linkend="ctr_gram">ctr_gram</link>
</member>
<member>
<link linkend="cont_frm">cont_frm</link>
</member>
<member>
<link linkend="contr">contr</link>
</member>
</simplelist>
</refsection>
</refentry>
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