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<?xml version="1.0" encoding="UTF-8"?>
<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" version="5.0-subset Scilab" xml:lang="fr" xml:id="colcompr">
<info>
<pubdate>$LastChangedDate$</pubdate>
</info>
<refnamediv>
<refname>colcompr</refname>
<refpurpose> compression des colonnes d'une matrice de polynômes </refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Séquence d'appel</title>
<synopsis>[Y,rk,ac]=colcompr(A);</synopsis>
</refsynopsisdiv>
<refsection>
<title>Paramètres</title>
<variablelist>
<varlistentry>
<term>A </term>
<listitem>
<para>matrice de polynômes
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Y </term>
<listitem>
<para>matrice carrée de polynômes (base unimodulaire à droite)
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>rk </term>
<listitem>
<para>rang normal de <literal>A</literal>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Ac </term>
<listitem>
<para>
: <literal>Ac=A*Y</literal>, matrice de polynômes
</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>
Compression de colonnes de la matrice de polynômes <literal>A</literal> (compression à gauche)
</para>
</refsection>
<refsection>
<title>Exemples</title>
<programlisting role="example"><![CDATA[
s=poly(0,'s');
p=[s;s*(s+1)^2;2*s^2+s^3];
[Y,rk,ac]=colcompr(p*p');
p*p'*Y
]]></programlisting>
</refsection>
<refsection role="see also">
<title>Voir aussi</title>
<simplelist type="inline">
<member>
<link linkend="rowcompr">rowcompr</link>
</member>
</simplelist>
</refsection>
</refentry>
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