<?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:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" xmlns:scilab="http://www.scilab.org" xml:lang="ja" xml:id="dbphi">
    <refnamediv>
        <refname>dbphi</refname>
        <refpurpose>位相および振幅表現の周波数応答</refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>呼び出し手順</title>
        <synopsis>[db,phi] =dbphi(repf)</synopsis>
    </refsynopsisdiv>
    <refsection>
        <title>パラメータ</title>
        <variablelist>
            <varlistentry>
                <term>db,phi</term>
                <listitem>
                    <para>ゲイン (db) および位相 (度)のベクトル</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>repf</term>
                <listitem>
                    <para>複素周波数応答のベクトル</para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsection>
    <refsection>
        <title>説明</title>
        <para>
            <literal>db(k)</literal> は <literal>repf(k)</literal> の振幅(単位: dB),
            すなわち <literal>db(k)=20*log(abs(repf(k)))/log(10)</literal> です.
            <literal>phi(k)</literal> は<literal>repf(k)</literal>の位相 (単位:度)です.
        </para>
    </refsection>
    <refsection role="see also">
        <title>参照</title>
        <simplelist type="inline">
            <member>
                <link linkend="repfreq">repfreq</link>
            </member>
            <member>
                <link linkend="bode">bode</link>
            </member>
        </simplelist>
    </refsection>
</refentry>
