<?xml version="1.0" encoding="UTF-8"?>
<!--
 * Scilab ( https://www.scilab.org/ ) - This file is part of Scilab
 * Copyright (C) ENPC - Jean-Philippe Chancelier
 *
 * Copyright (C) 2012 - 2016 - Scilab Enterprises
 *
 * This file is hereby licensed under the terms of the GNU GPL v2.0,
 * pursuant to article 5.3.4 of the CeCILL v.2.1.
 * This file was originally licensed under the terms of the CeCILL v2.1,
 * and continues to be available under such terms.
 * For more information, see the COPYING file which you should have received
 * along with this program.
 *
 -->
<refentry 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" xmlns:scilab="http://www.scilab.org" xml:id="grayplot" xml:lang="pt">
    <refnamediv>
        <refname>grayplot</refname>
        <refpurpose>esboço 2d de uma superfície utilizando-se cores</refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>Seqüência de Chamamento</title>
        <synopsis>grayplot(x,y,z,[strf,rect,nax])
            grayplot(x,y,z,&lt;opt_args&gt;)
        </synopsis>
    </refsynopsisdiv>
    <refsection>
        <title>Parâmetros</title>
        <variablelist>
            <varlistentry>
                <term>x,y</term>
                <listitem>
                    <para>vetores de reais de tamanhos n1 e n2. .</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>z</term>
                <listitem>
                    <para>
                        matriz de reais de tamanho (n1,n2). <literal>z(i,j)</literal>
                        é o valor da superfície no ponto(x(i),y(j)).
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>&lt;opt_args&gt;</term>
                <listitem>
                    <para>
                        representa uma seqüência de declarações <literal>key1=value1,
                            key2=value2
                        </literal>
                        ,... onde <literal>key1</literal>,
                        <literal>key2,...</literal> podem ser um dos seguintes: rect, nax,
                        strf, logflag 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>Descrição</title>
        <para>
            <literal>grayplot</literal> faz um esboço 2d de uma superfície dada
            por <literal>z</literal> em um grid definido por <literal>x</literal> e
            <literal>y</literal>. Cada retângulo no grid é preenchido com um nível de
            cinza ou de cor dependendo do valor médio de <literal>z</literal> nas
            quinas do retângulo.
        </para>
        <para>
            Entre com o comando <literal>grayplot()</literal> para visualizar
            uma demonstração.
        </para>
    </refsection>
    <refsection>
        <title>Exemplos</title>
        <programlisting role="example"><![CDATA[
x=-10:10; y=-10:10;m =rand(21,21);
grayplot(x,y,m,rect=[-20,-20,20,20])
t=-%pi:0.1:%pi; m=sin(t)'*cos(t);
clf()
grayplot(t,t,m)
 ]]></programlisting>
    </refsection>
    <refsection role="see also">
        <title>Ver Também</title>
        <simplelist type="inline">
            <member>
                <link linkend="fgrayplot">fgrayplot</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>
</refentry>
