<?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:ns5="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="ja">

    <refnamediv>

        <refname>inttrap</refname>

        <refpurpose>台形則による実験データの積分</refpurpose>

    </refnamediv>

    <refsynopsisdiv>

        <title>呼び出し手順</title>

        <synopsis>v = inttrap([x,] s)</synopsis>

    </refsynopsisdiv>

    <refsection>

        <title>引数</title>

        <variablelist>

            <varlistentry>

                <term>x</term>

                <listitem>

                    <para>

                        昇順の x 座標データのベクトル.

                        デフォルト値は

                        <literal>1:size(s,'*')</literal>です

                    </para>

                </listitem>

            </varlistentry>

            <varlistentry>

                <term>s</term>

                <listitem>

                    <para>y 座標データのベクトル</para>

                </listitem>

            </varlistentry>

            <varlistentry>

                <term>v</term>

                <listitem>

                    <para>積分値</para>

                </listitem>

            </varlistentry>

        </variablelist>

    </refsection>

    <refsection>

        <title>説明</title>

        <para>以下を計算します :</para>

        <para>

            <literal>s(i)=f(x(i))</literal> および <literal>x0=x(1)</literal>,

            <literal>x1=x(n)</literal>

        </para>

        <para>

            ただし, <literal>f</literal> は実験値の集合により記述された関数です.

        </para>

        <para>メッシュ点関数の間は線形補間されます.</para>

    </refsection>

    <refsection>

        <title>例</title>

        <programlisting role="example"><![CDATA[
t=0:0.1:%pi
inttrap(t,sin(t))
 ]]></programlisting>

    </refsection>

    <refsection role="see also">

        <title>参照</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>

