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<?xml version="1.0" encoding="UTF-8"?>
<!--
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) 2002-2006 - INRIA - Serge STEER
*
* 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="fr" xml:id="interpln">
<refnamediv>
<refname>interpln</refname>
<refpurpose>interpolation linéaire </refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Séquence d'appel</title>
<synopsis>[y]=interpln(xyd,x)</synopsis>
</refsynopsisdiv>
<refsection>
<title>Paramètres</title>
<variablelist>
<varlistentry>
<term>xyd </term>
<listitem>
<para>matrice à deux lignes (coordonnées x et y des points)
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>x </term>
<listitem>
<para>vecteur des abscisses
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>y </term>
<listitem>
<para>vecteur des ordonnées
</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>
étant donné <literal>xyd</literal> un ensemble de points dans le plan avec des abscisses croissantes et <literal>x</literal> un ensemble d'abscisses, cette fonction renvoie dans <literal>y</literal> les ordonnées correspondantes, calculées par interpolation linéaire.
</para>
</refsection>
<refsection>
<title>Exemples</title>
<programlisting role="example"><![CDATA[
x=[1 10 20 30 40];
y=[1 30 -10 20 40];
plot2d(x',y',[-3],"011"," ",[-10,-40,50,50]);
yi=interpln([x;y],-4:45);
plot2d((-4:45)',yi',[3],"000");
]]></programlisting>
</refsection>
<refsection role="see also">
<title>Voir aussi</title>
<simplelist type="inline">
<member>
<link linkend="splin">splin</link>
</member>
<member>
<link linkend="interp">interp</link>
</member>
<member>
<link linkend="smooth">smooth</link>
</member>
</simplelist>
</refsection>
</refentry>
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