* Get ride of the useless tag
[scilab.git] / scilab / modules / elementary_functions / help / ja_JP / discrete / rat.xml
1 <?xml version="1.0" encoding="UTF-8"?>
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13 <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="rat" xml:lang="ja">
14     <refnamediv>
15         <refname>rat</refname>
16         <refpurpose>浮動小数点数の有理数近似</refpurpose>
17     </refnamediv>
18     <refsynopsisdiv>
19         <title>呼び出し手順</title>
20         <synopsis>[N,D]=rat(x [,tol])
21             y=rat(x [,tol])
22         </synopsis>
23     </refsynopsisdiv>
24     <refsection>
25         <title>パラメータ</title>
26         <variablelist>
27             <varlistentry>
28                 <term>x</term>
29                 <listitem>
30                     <para>実数のベクトルまたは行列</para>
31                 </listitem>
32             </varlistentry>
33             <varlistentry>
34                 <term>n</term>
35                 <listitem>
36                     <para>整数のベクトルまたは行列</para>
37                 </listitem>
38             </varlistentry>
39             <varlistentry>
40                 <term>d</term>
41                 <listitem>
42                     <para>整数のベクトルまたは行列</para>
43                 </listitem>
44             </varlistentry>
45             <varlistentry>
46                 <term>y</term>
47                 <listitem>
48                     <para>実数のベクトルまたは行列</para>
49                 </listitem>
50             </varlistentry>
51         </variablelist>
52     </refsection>
53     <refsection>
54         <title>説明</title>
55         <para>
56             <literal>[N,D] = rat(x,tol)</literal> は,
57             <literal>abs(N./D - X) &lt;= tol*abs(x)</literal>の意味で
58             <literal>N./D</literal>が<literal>x</literal>に近くなるような
59             2つの整数行列を返します.
60             有理数近似は分数展開を丸めることにより生成されます.
61             デフォルトは
62             <literal>tol = 1.e-6*norm(X,1)</literal> です. <literal>y =
63                 rat(x,tol)
64             </literal>
65             は商 <literal>N./D</literal>を返します.
66         </para>
67     </refsection>
68     <refsection>
69         <title>例</title>
70         <programlisting role="example"><![CDATA[ 
71 [n,d]=rat(%pi)
72 [n,d]=rat(%pi,1.d-12)
73 n/d-%pi
74  ]]></programlisting>
75     </refsection>
76     <refsection role="see also">
77         <title>参照</title>
78         <simplelist type="inline">
79             <member>
80                 <link linkend="int">int</link>
81             </member>
82             <member>
83                 <link linkend="round">round</link>
84             </member>
85         </simplelist>
86     </refsection>
87 </refentry>