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std::exp<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

 
 
ニューメリックスライブラリ
一般的な数学関数
浮動小数点環境
複素数
数値配列
擬似乱数生成
コンパイル時有理数演算 (C++11)
汎用の数値演算
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
 
Defined in header <valarray>
template< class T >
valarray<T> exp( const valarray<T>& va );
va内の要素ごとに計算し eの要素の値に等しい回数だけ累乗.
Original:
For each element in va computes e raised to the power equal to 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の値によって提起 Eを含む値の配列.
Original:
Value array containing e raised by the values in va.
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[編集] ノート

修飾されていない機能(exp)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::expは、引数依存の照合のために使用され.
Original:
Unqualified function (exp) is used to perform the computation. If such function is not available, std::exp 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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  • constのすべてstd::valarrayメンバ関数が用意されています.
    Original:
    All const member functions of std::valarray are provided.
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  • std::valarraystd::slice_arraystd::gslice_arraystd::mask_arraystd::indirect_array交換タイプから構築することができます.
    Original:
    std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.
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  • タイプconst std::valarray&の引数を受け付ける機能は、すべての交換タイプを受け入れる必要があります.
    Original:
    All functions accepting a arguments of type const std::valarray& should also accept the replacement type.
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  • タイプconst std::valarray&の2つの引数を受け入れるすべての機能がconst std::valarray&と交換タイプのすべての組み合わせを受け入れるべき.
    Original:
    All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.
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[編集] 可能な実装

template< class T >
valarray<T> exp( const valarray<T>& va )
{
    valarray<T> other = va;
    for (T &i : other) {
        i = exp(i);
    }
    return other; // proxy object may be returned
}

[編集]

この例では、オイラーの恒等e
= -1
および関連指数を示しています.
Original:
This example demonstrates the Euler's identity e
= -1
and the related exponents.
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#include <iostream>
#include <complex>
#include <valarray>
 
int main()
{
    const double pi = std::acos(-1);
    std::valarray<std::complex<double>> v = {
        {0, 0}, {0, pi/2}, {0, pi}, {0, 3*pi/2}, {0, 2*pi}
    };
    std::valarray<std::complex<double>> v2 = std::exp(v);
    for(auto n : v2) {
        std::cout << std::fixed << n << '\n';
    }
}

Output:

(1.000000,0.000000)
(0.000000,1.000000)
(-1.000000,0.000000)
(-0.000000,-1.000000)
(1.000000,-0.000000)

[編集] も参照してください

戻り eを与えられた電力(ex)に引き上げた
Original:
returns e raised to the given power (ex)
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(関数) [edit]
complex base e exponential
(関数テンプレート) [edit]