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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="champ" 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:ns5="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>champ</refname>
<refpurpose>esboo de campo vetorial 2d</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Seqncia de Chamamento</title>
<synopsis>champ(x,y,fx,fy,[arfact,rect,strf])
champ(x,y,fx,fy,<opt_args>)</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parmetros</title>
<variablelist>
<varlistentry>
<term>x,y</term>
<listitem>
<para>dois vetores que definem o grid</para>
</listitem>
</varlistentry>
<varlistentry>
<term>fx</term>
<listitem>
<para>uma matriz que descreve o componente x do campo vetorial.
<literal>fx(i,j)</literal> o componente x do campo vetorial no
ponto <literal>(x(i),y(j))</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>fy</term>
<listitem>
<para>uma matriz que descreve o componente y do campo vetorial.
<literal>fy(i,j)</literal> o componente y do campo vetorial no
ponto <literal>(x(i),y(j))</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><opt_args></term>
<listitem>
<para>representa a seqncia de declaraes
<literal>key1=value1,key2=value2</literal>,... onde
<literal>key1</literal>, <literal>key2,...</literal> podem ser um
dos seguintes: arfact, rect, strf (ver abaixo).</para>
</listitem>
</varlistentry>
<varlistentry>
<term>arfact</term>
<listitem>
<para>um argumento opcional do tipo real que fornece um fator de
escala para a exibio das cabeas das setas no esboo (o valor
padro 1.0).</para>
</listitem>
</varlistentry>
<varlistentry>
<term>rect</term>
<listitem>
<para>um vetor <literal>rect=[xmin,ymin,xmax,ymax]</literal> que
fornece as fronteiras da moldura grfica ser utilizada.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>strf</term>
<listitem>
<para>um string de comprimento 3 "xyz" que possui o mesmo
significado do parmetro <literal>strf</literal> de
<literal>plot2d</literal>. O primeiro caractere no tem efeito com
<literal>champ</literal>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Descrio</title>
<para><literal>champ</literal> desenha um campo vetorial 2d. O comprimento
das setas proporcional proporcional intensidade do campo.</para>
<para>Se voc quiser setas coloridas com a cor das setas dependendo da
intensidade do campo, use <literal>champ1</literal>.</para>
<para>Entre com o comando <literal>champ()</literal> para visualizar uma
demonstrao.</para>
</refsection>
<refsection>
<title>Exemplos</title>
<programlisting role="example"><![CDATA[
// usando rect como fronteiras do esboo
champ(-5:5,-5:5,rand(11,11),rand(11,11),rect=[-10,-10,10,10],arfact=2)
// usando (x,y) para conseguir obter
clf()
champ(-5:5,-5:5,rand(11,11),rand(11,11),2,[-10,-10,10,10],"021")
]]></programlisting>
</refsection>
<refsection>
<title>Ver Tambm</title>
<simplelist type="inline">
<member><link linkend="champ1">champ1</link></member>
<member><link linkend="fchamp">fchamp</link></member>
<member><link linkend="plot2d">plot2d</link></member>
</simplelist>
</refsection>
<refsection>
<title>Autor</title>
<para>J.Ph.C.</para>
</refsection>
</refentry>
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