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std::log<div class="t-tr-text">(スタンダード:: valarrayは)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::valarray)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

提供: cppreference.com
< cpp‎ | numeric‎ | valarray

 
 
 
 
ヘッダ <valarray> で定義
template< class T >
valarray<T> log( const valarray<T>& va );
vaの各要素に対して、要素の値の自然対数を計算します。
Original:
For each element in va computes natural logarithm of the value of the element.
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目次

[編集] パラメータ

va -
に操作を適用する値の配列
Original:
value array to apply the operation to
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[編集] 値を返します

va内の値の値の配列自然対数。
Original:
Value array natural logarithms of the values in va.
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[編集] ノート

修飾されていない機能(log)計算を実行するために使用されます。そのような機能が利用できない場合、std::logは、引数依存の照合のために使用され.
Original:
Unqualified function (log) is used to perform the computation. If such function is not available, std::log is used due to argument dependent lookup.
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関数はstd::valarrayから別の戻り値型で実装することができます。この場合、交換型は、次のプロパティがあります
Original:
The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:
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[編集] 可能な実装

template< class T >
valarray<T> log( const valarray<T>& va )
{
    valarray<T> other = va;
    for (T &i : other) {
        i = log(i);
    }
}

[編集]