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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) ENPC - Jean-Philippe Chancelier
*
* 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-en.txt
*
-->
<refentry version="5.0-subset Scilab" xml:id="fgrayplot" xml:lang="en"
xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns:ns4="http://www.w3.org/1999/xhtml"
xmlns:mml="http://www.w3.org/1998/Math/MathML"
xmlns:db="http://docbook.org/ns/docbook">
<info>
<pubdate>$LastChangedDate$</pubdate>
</info>
<refnamediv>
<refname>fgrayplot</refname>
<refpurpose>esboo 2d de uma superfcie definida por uma funo utilizando
cores</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Seqncia de Chamamento</title>
<synopsis>fgrayplot(x,y,f,[strf,rect,nax])
fgrayplot(x,y,f,<opt_args>)</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parmetros</title>
<variablelist>
<varlistentry>
<term>x,y</term>
<listitem>
<para>vetor linha de reais</para>
</listitem>
</varlistentry>
<varlistentry>
<term>f</term>
<listitem>
<para>funo externa do tipo <literal>y=f(x,y)</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><opt_args></term>
<listitem>
<para>representa uma seqncia de declaraes <literal>key1=value1,
key2=value2</literal>,... onde <literal>key1</literal>,
<literal>key2,...</literal> pode ser um dos seguintes: rect, nax,
strf ou axesflag e frameflag (ver <literal>plot2d</literal>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term>strf,rect,nax</term>
<listitem>
<para>ver <literal>plot2d</literal>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Descrio</title>
<para><literal>fgrayplot</literal> realiza um esboo 2d de uma superfcie
dada por <literal>z=f(x,y)</literal> em um grid definido por
<literal>x</literal> e <literal>y</literal>. Cada retngulo no grid
preenchido com um nvel de cinza ou de cor dependendo do valor mdio de
<literal>z</literal> nas quinas do retngulo.</para>
<para>Entre com o comando <literal>fgrayplot()</literal> para visualizar
uma demonstrao.</para>
</refsection>
<refsection>
<title>Exemplos</title>
<programlisting role="example"><![CDATA[
t=-1:0.1:1;
deff("[z]=my_surface(x,y)","z=x**2+y**2")
fgrayplot(t,t,my_surface,rect=[-2,-2,2,2])
]]></programlisting>
</refsection>
<refsection>
<title>Ver Tambm </title>
<simplelist type="inline">
<member><link linkend="grayplot">grayplot</link></member>
<member><link linkend="plot2d">plot2d</link></member>
<member><link linkend="Sgrayplot">Sgrayplot</link></member>
<member><link linkend="Sfgrayplot">Sfgrayplot</link></member>
</simplelist>
</refsection>
<refsection>
<title>Autor</title>
<para>J.Ph.C.</para>
</refsection>
</refentry>
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