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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="xarrows" 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:ns3="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>xarrows</refname>
<refpurpose>desenha um conjunto de setas</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Seqncia de Chamamento</title>
<synopsis>xarrows(nx,ny,[arsize,style])</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parmetros</title>
<variablelist>
<varlistentry>
<term>nx,ny</term>
<listitem>
<para>vetores ou matrizes de reais de mesmo tamanho </para>
</listitem>
</varlistentry>
<varlistentry>
<term>arsize</term>
<listitem>
<para>escalar real, o tamanho da cabea da seta. O tamanho padro
pode ser obtido ajustando arsize para -1. </para>
</listitem>
</varlistentry>
<varlistentry>
<term>style</term>
<listitem>
<para>matriz ou escalar. Se <literal>style</literal> for um escalar
positivo, fornece a cor a ser usada em todas as setas. Se for
negativo, a cor corrente utilizada. Se for um vetor
<literal>style(i)</literal> fornece a cor a ser utilizada no vetor
<literal>i</literal>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Descrio</title>
<para><literal>xarrows</literal> desenha um conjunto de setas dadas por
<literal>nx</literal> e <literal>ny</literal>. Se <literal>nx</literal> e
<literal>ny</literal> forem vetores, a i-sima seta definida por
<literal>(nx(i),ny(i))-->(nx(i+1),ny(i+1))</literal>. Se
<literal>nx</literal> e <literal>ny</literal> so matrizes:</para>
<programlisting role = ""><![CDATA[
nx=[xi_1 x1_2 ...; xf_1 xf_2 ...]
ny=[yi_1 y1_2 ...; yf_1 yf_2 ...]
]]></programlisting>
<para>a <literal>k</literal>-sima seta definida por
<literal>(xi_k,yi_k)-->(xf_k,yf_k)</literal>.</para>
<para><literal>xarrows</literal> utiliza a escala de grficos corrente que
pode ser ajustada atravs de uma chamada a uma funo de esboo de
alto-nvel como <literal>plot2d</literal>.</para>
</refsection>
<refsection>
<title>Exemplos</title>
<programlisting role="example"><![CDATA[
x=2*%pi*(0:9)/8;
x1=[sin(x);9*sin(x)];
y1=[cos(x);9*cos(x)];
plot2d([-10,10],[-10,10],[-1,-1],"022")
xset("clipgrf")
xarrows(x1,y1,1,1:10)
xset("clipoff")
]]></programlisting>
</refsection>
<refsection>
<title>Autor</title>
<para>J.Ph.C.</para>
</refsection>
</refentry>
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