File: eval3d.xml

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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="eval3d">
  <info>
    <pubdate>$LastChangedDate$</pubdate>
  </info>
  <refnamediv>
    <refname>eval3d</refname>
    <refpurpose> valeurs d'une fonction sur une grille  </refpurpose>
  </refnamediv>
  <refsynopsisdiv>
    <title>Séquence d'appel</title>
    <synopsis>[z]=eval3d(fun,x,[y])</synopsis>
  </refsynopsisdiv>
  <refsection>
    <title>Paramètres</title>
    <variablelist>
      <varlistentry>
        <term>fun  </term>
        <listitem>
          <para>fonction acceptant des arguments vectoriels
</para>
        </listitem>
      </varlistentry>
      <varlistentry>
        <term>x,y  </term>
        <listitem>
          <para>2 vecteurs de tailles (1,n1) et (1,n2) (par défaut <literal>y=x</literal>).
</para>
        </listitem>
      </varlistentry>
      <varlistentry>
        <term>z  </term>
        <listitem>
          <para>matrice de taille (n1,n2).
</para>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsection>
  <refsection>
    <title>Description</title>
    <para>
    Cette fonction renvoie une matrice <literal>z(n1,n2)</literal> où <literal>z(i,j)=fun(x(i),y(j))</literal>. 
    Si la fonction <literal>fun</literal> n'accepte pas d'arguments vectoriels utiliser
    la primitive <literal>feval</literal>.
  </para>
  </refsection>
  <refsection>
    <title>Exemples</title>
    <programlisting role="example"><![CDATA[ 
x=-5:5;y=x;
deff('[z]=f(x,y)',['z= x.*y']);
z=eval3d(f,x,y);
plot3d(x,y,z);

deff('[z]=f(x,y)',['z= x*y']);
z=feval(x,y,f);
plot3d(x,y,z);
 ]]></programlisting>
  </refsection>
  <refsection>
    <title>Voir Aussi</title>
    <simplelist type="inline">
      <member>
        <link linkend="feval">feval</link>
      </member>
    </simplelist>
  </refsection>
  <refsection>
    <title>Auteurs</title>
    <para>Steer S.; ; ;   </para>
  </refsection>
</refentry>