scilab/modules/string/help/ja_JP/evstr.xml

   1 <?xml version="1.0" encoding="UTF-8"?>
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  15 <refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink"
  16           xmlns:svg="http://www.w3.org/2000/svg" xmlns:ns5="http://www.w3.org/1999/xhtml"
  17           xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook"
  18           xmlns:scilab="http://www.scilab.org" xml:id="evstr" xml:lang="ja">
  19     <refnamediv>
  20         <refname>evstr</refname>
  21         <refpurpose>式を評価する</refpurpose>
  22     </refnamediv>
  23     <refsynopsisdiv>
  24         <title>呼び出し手順</title>
  25         <synopsis>
  26             H = evstr(Z)
  27             [H, ierr] = evstr(Z)
  28         </synopsis>
  29     </refsynopsisdiv>
  30     <refsection>
  31         <title>引数</title>
  32         <variablelist>
  33             <varlistentry>
  34                 <term>Z</term>
  35                 <listitem>
  36                     <para>
  37                         文字列の行列 <varname>M</varname> または
  38                         <code>list(M,Subexp)</code>
  39                     </para>
  40                     <variablelist>
  41                         <varlistentry>
  42                             <term>M</term>
  43                             <listitem>
  44                                 <para>文字列の行列</para>
  45                             </listitem>
  46                         </varlistentry>
  47                         <varlistentry>
  48                             <term>Subexp</term>
  49                             <listitem>
  50                                 <para>文字列のベクトル</para>
  51                             </listitem>
  52                         </varlistentry>
  53                     </variablelist>
  54                 </listitem>
  55             </varlistentry>
  56             <varlistentry>
  57                 <term>H</term>
  58                 <listitem>
  59                     <para>行列</para>
  60                 </listitem>
  61             </varlistentry>
  62             <varlistentry>
  63                 <term>ierr</term>
  64                 <listitem>
  65                     <para>整数, エラーインジケータ</para>
  66                 </listitem>
  67             </varlistentry>
  68         </variablelist>
  69     </refsection>
  70     <refsection>
  71         <title>説明</title>
  72         <para>
  73             文字列の行列<varname>M</varname>を評価した結果を返します.
  74             行列の各要素は有効なScilab式を定義している必要があります.
  75         </para>
  76         <para>
  77             <varname>M</varname>式の評価でエラーが発生した場合,
  78             戻り値が1つの版,<code>H = evstr(M)</code>,では通常と同様に
  79             エラーを発生します.
  80             一方,戻り値が2つの版,<code>[H,ierr] = evstr(M)</code>,
  81             はエラーを発生しませんが,<varname>ierr</varname>にエラー番号が
  82             返されます.
  83         </para>
  84         <para>
  85             <varname>Z</varname> がリストの場合, <varname>Subexp</varname> は
  86             文字列のベクトルとなり,<varname>M</varname>を評価する前に
  87             評価されるsub_expressionsを定義します.
  88             これらのsub_expressionsは,<varname>M</varname>の中では
  89             <literal>%(k)</literal>として参照する必要があります.
  90             ただし,<literal>k</literal>は<varname>Subexp</varname>における
  91             sub-expressionのインデックスです.
  92         </para>
  93         <para>
  94             <code>evstr('a = 1')</code> は有効ではありません
  95             (代わりに<function>execstr</function>を使用してください).
  96         </para>
  97         <para>
  98             <literal>Nan</literal>, <literal>NaN</literal>
  99             は <constant>%nan</constant> と評価されます.
 100         </para>
 101         <para>
 102             <literal>Inf</literal> は <constant>%inf</constant> と評価されます.
 103         </para>
 104         <warning>
 105             <varname>Z</varname> は,継続記号 (..)で分解できない
 106             ことに注意してください.
 107         </warning>
 108     </refsection>
 109     <refsection>
 110         <title>例</title>
 111         <programlisting role="example"><![CDATA[
 112 a = 1; b = 2;
 113 Z = ['a', 'b'] ;
 114 evstr(Z)
 115
 116 Z = list(['%(1)','%(1)-%(2)'],['a+1','b+1']);
 117 evstr(Z)
 118 evstr('NaN'), evstr('Inf')
 119
 120 //The two return values version
 121 [H, ierr] = evstr(Z) // no error
 122 Z = ['a', 'b', 'c'] ;// the variable c is undefined
 123 [H, ierr] = evstr(Z) // error 4: Undefined variable: c
 124 ]]>
 125         </programlisting>
 126     </refsection>
 127     <refsection role="see also">
 128         <title>参照</title>
 129         <simplelist type="inline">
 130             <member>
 131                 <link linkend="execstr">execstr</link>
 132             </member>
 133             <member>
 134                 <link linkend="sci2exp">sci2exp</link>
 135             </member>
 136             <member>
 137                 <link linkend="strtod">strtod</link>
 138             </member>
 139             <member>
 140                 <link linkend="brackets">concatenation</link>
 141             </member>
 142         </simplelist>
 143     </refsection>
 144     <refsection role="history">
 145         <title>履歴</title>
 146         <revhistory>
 147             <revision>
 148                 <revnumber>5.3.0</revnumber>
 149                 <revdescription>
 150                 <literal>"Nan"</literal> and <literal>"NaN"</literal> are now parsed as <literal>%nan</literal>.
 151                 <literal>"Inf"</literal> and <literal>"INF"</literal> are now parsed as <literal>%inf</literal>.
 152                 </revdescription>
 153             </revision>
 154             <revision>
 155                 <revnumber>6.0.1</revnumber>
 156                 <revdescription>
 157                   Simple comments are now supported in almost all possible input expressions,
 158                   whatever is the shape of <literal>M</literal>.
 159                 </revdescription>
 160             </revision>
 161         </revhistory>
 162     </refsection>
 163 </refentry>