std::valarray::apply

 

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

 

valarray<T> apply( T func(T))const;
valarray<T> apply( T func(const T&))const;

要素の前の値に関数funcを適用することによって取得された値と同じサイズの新しいvalarrayを返します。.

Original:

Returns a new valarray of the same size with values which are acquired by applying function func to the previous values of the elements.

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パラメータ

func

-

値に適用する機能 Original: function to apply to the values 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

機能funcを適用することにより、取得した値を持つ結果のvalarray.

Original:

The resulting valarray with values acquired by applying function func.

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ノート

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conststd::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 conststd::valarray& should also accept the replacement type.

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• タイプconststd::valarray&の2つの引数を受け入れるすべての機能がconststd::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 conststd::valarray& should accept every combination of conststd::valarray& and the replacement type.

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例

最初の10乗を計算し、出力します

Original:

calculates and prints the first 10 factorials

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このコードを実行します

#include <iostream>#include <valarray>#include <cmath>   int main(){std::valarray<int> v ={1,2,3,4,5,6,7,8,9,10}; v = v.apply([](int n)->int{returnstd::round(std::tgamma(n+1));});for(auto n : v){std::cout<< n <<' ';}std::cout<<'\n';}

出力:

1 2 6 24 120 720 5040 40320 362880 3628800

参照

for_each	ある範囲の要素に関数が適用されます Original: applies a function to a range of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数テンプレート)