<?xml version="1.0" encoding="UTF-8"?>
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<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="inttrap" xml:lang="pt">
    <refnamediv>
        <refname>inttrap</refname>
        <refpurpose>integração de dados experimentais por interpolação
            trapezoidal
        </refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>Seqüência de Chamamento</title>
        <synopsis>v = inttrap([x,] s)</synopsis>
    </refsynopsisdiv>
    <refsection>
        <title>Parâmetros</title>
        <variablelist>
            <varlistentry>
                <term>x</term>
                <listitem>
                    <para>vetor de dados de coordenadas x crescentes. O valor padrão é
                        <literal>1:size(s,'*')</literal>
                    </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>s</term>
                <listitem>
                    <para>vetor de dados de coordenadas y </para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>v</term>
                <listitem>
                    <para>valor da integral </para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsection>
    <refsection>
        <title>Descrição</title>
        <para>Computa :</para>
        <para>Onde f é uma função descrita por um conjuto de valores
            experimentais:
        </para>
        <para>
            <literal>s(i)=f(x(i))</literal> e <literal>x0=x(1)</literal>,
            <literal>x1=x(n)</literal>
        </para>
        <para>Entre os pontos da malha, a função é interpolada linearmente.</para>
    </refsection>
    <refsection>
        <title>Exemplos</title>
        <programlisting role="example"><![CDATA[
t=0:0.1:%pi
inttrap(t,sin(t))
 ]]></programlisting>
    </refsection>
    <refsection role="see also">
        <title>Ver Também</title>
        <simplelist type="inline">
            <member>
                <link linkend="intg">intg</link>
            </member>
            <member>
                <link linkend="intc">intc</link>
            </member>
            <member>
                <link linkend="intl">intl</link>
            </member>
            <member>
                <link linkend="integrate">integrate</link>
            </member>
            <member>
                <link linkend="intsplin">intsplin</link>
            </member>
            <member>
                <link linkend="splin">splin</link>
            </member>
        </simplelist>
    </refsection>
</refentry>
