scilab/modules/cacsd/help/ja_JP/noisegen.xml

   1 <?xml version="1.0" encoding="UTF-8"?>
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  16 <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="noisegen">
  17     <refnamediv>
  18         <refname>noisegen</refname>
  19         <refpurpose>ノイズ生成 <emphasis role="bold">(obsolete)</emphasis></refpurpose>
  20     </refnamediv>
  21     <refsynopsisdiv>
  22         <title>呼び出し手順</title>
  23         <synopsis>b=noisegen(pas,Tmax,sig)</synopsis>
  24     </refsynopsisdiv>
  25     <refsection>
  26         <title>説明</title>
  27         <warning>
  28             <literal>noisegen()</literal> is obsolete. It will be removed from Scilab 6.1.x.
  29             Please use grand() instead. Examples (clearer, shorter, and more powerful) follow:
  30             <para/>
  31             <para>
  32             100 10-point wide steps with random amplitudes of normal distribution
  33             of mean 1 and standard deviation 0.7:
  34             </para>
  35             <programlisting role="example"><![CDATA[
  36             u = grand(1,100,"nor",1,0.7) .*. ones(1,10);
  37             clf, plot(u);
  38             ]]></programlisting>
  39             <para/>
  40             <para>
  41             40 15-point wide steps with random amplitudes of uniform distribution in [1 3],
  42             with initial level 0.5 and final level hold:
  43             </para>
  44             <programlisting role="example"><![CDATA[
  45             width = 15;
  46             u = grand(1,40, "unf", 1, 3) .*. ones(1,width);
  47             u = [ones(1,8*width)*0.5, u, ones(1,5*width)*u($)];
  48             clf, plot(u);
  49             ]]></programlisting>
  50         </warning>
  51         <para>
  52             Scilab 関数 <literal>[b]=Noise(t)</literal>を生成します.
  53             ただし, <literal>Noise(t)</literal>は区分定数関数です
  54             (<literal>[k*pas,(k+1)*pas]</literal>の区間は定数).
  55             各一定区間の値は,
  56             互いに独立で同一の分布に従う標準偏差 sig のガウス分布
  57             によるランダムな値です.
  58             関数は,<literal>t&lt;=0</literal>および
  59             <literal>t&gt;=Tmax</literal>では一定です.
  60         </para>
  61     </refsection>
  62     <refsection>
  63         <title>例</title>
  64         <programlisting role="example"><![CDATA[
  65 noisegen(0.5,30,1.0);
  66 x=-5:0.01:35;
  67 y=feval(x,Noise);
  68 plot(x,y);
  69  ]]></programlisting>
  70     </refsection>
  71     <refsection role="history">
  72         <title>履歴</title>
  73         <revhistory>
  74             <revision>
  75                 <revnumber>6.1.0</revnumber>
  76                 <revdescription>
  77                     noisegen() is obsolete. It will be removed from Scilab 6.1.x.
  78                     Please replace it with grand() and .*.
  79                 </revdescription>
  80             </revision>
  81         </revhistory>
  82     </refsection>
  83 </refentry>