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  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2012-08-30 14:42:38 UTC
  • mfrom: (1.4.7)
  • Revision ID: package-import@ubuntu.com-20120830144238-c1y2og7dbm7m9nig
Tags: 5.4.0-beta-3-1~exp1
* New upstream release
* Update the scirenderer dep
* Get ride of libjhdf5-java dependency

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<?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" version="5.0-subset Scilab" xml:lang="ja" xml:id="buttmag">
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  <refnamediv>
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    <refname>buttmag</refname>
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    <refpurpose>バターワースフィルタの応答</refpurpose>
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  </refnamediv>
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  <refsynopsisdiv>
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    <title>呼び出し手順</title>
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    <synopsis>[h]=buttmag(order,omegac,sample)</synopsis>
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  </refsynopsisdiv>
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  <refsection>
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    <title>パラメータ</title>
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    <variablelist>
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      <varlistentry>
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        <term>order</term>
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        <listitem>
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          <para>整数: フィルタ次数</para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term>omegac</term>
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        <listitem>
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          <para>実数 : カットオフ周波数(単位:Hz)</para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term>sample</term>
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        <listitem>
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          <para>
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            <literal>buttmag</literal>が評価する周波数ベクトル
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          </para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term>h</term>
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        <listitem>
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          <para>サンプル点におけるバターワースフィルタの値</para>
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        </listitem>
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      </varlistentry>
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    </variablelist>
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  </refsection>
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  <refsection>
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    <title>説明</title>
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    <para>
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      バターワースフィルタの二乗振幅応答
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      <literal>omegac</literal> = カットオフ周波数 ; <literal>sample</literal> = 
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      周波数のサンプル
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    </para>
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  </refsection>
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  <refsection>
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    <title>例</title>
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    <programlisting role="example"><![CDATA[ 
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//バターワースフィルタの二乗振幅応答
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h=buttmag(13,300,1:1000);
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mag=20*log(h)'/log(10);
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plot2d((1:1000)',mag,[2],"011"," ",[0,-180,1000,20])
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 ]]></programlisting>
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  </refsection>
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</refentry>