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>

 

C++

言語

コンセプト

ユーティリティライブラリ

ストリングスライブラリ

コンテナライブラリ

アルゴリズムライブラリ

イテレータライブラリ

ニューメリックスライブラリ

入力/出力ライブラリ

ローカライゼーションライブラリ

正規表現ライブラリ (C++11)

アトミック操作ライブラリ (C++11)

スレッドのサポートライブラリ (C++11)

 

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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iota (C++11)

accumulate

inner_product

adjacent_difference

partial_sum

 

std::valarray

メンバ関数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
valarray::valarray valarray::~valarray valarray::operator= valarray::operator[] valarray::swap valarray::size valarray::resize valarray::sum valarray::min valarray::max valarray::shift valarray::cshift valarray::apply	valarray::operator+ valarray::operator- valarray::operator~ valarray::operator! valarray::operator+= valarray::operator-= valarray::operator*= valarray::operator/= valarray::operator%= valarray::operator&= valarray::operator|= valarray::operator^= valarray::operator<<= valarray::operator>>=
非メンバ関数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
swap (C++11) begin (C++11) end (C++11) abs exp log log10 pow sqrt sin cos tan asin acos atan atan2 sinh cosh tanh	operator* operator/ operator% operator+ operator- operator^ None operator& operator| operator<< operator>> operator&& operator None operator== operator!= operator< operator> operator<= operator>=
ヘルパークラス Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
slice_array gslice_array indirect_array	slice gslice mask_array

 

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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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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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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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::valarray、std::slice_array、std::gslice_array、std::mask_arrayとstd::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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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 }

例

この例では、オイラーの恒等eiπ
= -1および関連指数を示しています.

Original:

This example demonstrates the Euler's identity eiπ
= -1 and the related exponents.

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このコードを実行します

#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';
    }
}

出力:

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

参照

exp	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) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数)
exp(std::complex)	complex base e exponential (関数テンプレート)