std::lognormal_distribution

 

C++

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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

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入力/出力ライブラリ

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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

 

擬似乱数生成

エンジンとエンジンアダプタ Original: Engines and engine adaptors The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

linear_congruential_engine (C++11)

mersenne_twister_engine (C++11)

subtract_with_carry_engine (C++11)

discard_block_engine (C++11)

independent_bits_engine (C++11)

shuffle_order_engine (C++11)

ジェネレータ Original: Generators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

random_device (C++11)

ディストリビューション Original: Distributions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

一様分布 Original: Uniform distributions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

uniform_int_distribution (C++11)

uniform_real_distribution (C++11)

generate_canonical (C++11)

ベルヌーイ分布 Original: Bernoulli distributions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

bernoulli_distribution (C++11)

binomial_distribution (C++11)

negative_binomial_distribution (C++11)

geometric_distribution (C++11)

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poisson_distribution (C++11)

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gamma_distribution (C++11)

weibull_distribution (C++11)

extreme_value_distribution (C++11)

正規分布 Original: Normal distributions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

normal_distribution (C++11)

lognormal_distribution (C++11)

chi_squared_distribution (C++11)

cauchy_distribution (C++11)

fisher_f_distribution (C++11)

student_t_distribution (C++11)

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seed_seq (C++11)

Cライブラリ Original: C library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rand

srand

RAND_MAX

 

std::lognormal_distribution

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.

lognormal_distribution::lognormal_distribution

lognormal_distribution::reset

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

lognormal_distribution::operator()

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

lognormal_distribution::param

lognormal_distribution::min

lognormal_distribution::max

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.

operator== operator!=

operator<< operator>>

 

Defined in header <random>
template< class RealType = double > class lognormal_distribution;		(C + + 11以来)

lognormal_distribution乱数分布は乱数を生成x > 0対数正規分布に従う

Original:

The lognormal_distribution random number distribution produces random numbers x > 0 according to a log-normal distribution:

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f(x; m,s) = None

1

sx√2 π

exp⎛
⎜
⎝- None

(ln x - m)2

2s2

⎞
⎟
⎠

パラメータmは、平均値と標準偏差パラメータsです.

Original:

The parameter m is the mean and the parameter s the standard deviation.

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メンバータイプ

メンバー·タイプ Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
result_type	RealType
param_type	不特定のパラメータセットのタイプ Original: the type of the parameter set, unspecified The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

メンバ関数

(constructor)	新しいディストリビューションを構築します Original: constructs new distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
reset	リセットさ分布の内部状態 Original: resets the internal state of the distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
世代 Original: Generation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
operator()	ディストリビューションの次の乱数を生成します Original: generates the next random number in the distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
特性 Original: Characteristics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
m	平均（m）分布パラメータを返します Original: returns the mean (m) distribution parameter The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
s	標準偏差（s）分布パラメータを返します Original: returns the standard deviation (s) distribution parameter The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
param	分布パラメータオブジェクトを取得または設定します Original: gets or sets the distribution parameter object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
min	最小潜在的に生成された値を返します Original: returns the minimum potentially generated value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)
max	最大潜在的に生成された値を返します Original: returns the maximum potentially generated value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (パブリックメンバ関数)

非メンバ関数

operator== operator!=	2つのディストリビューションオブジェクトを比較します Original: compares two distribution objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (機能)
operator<< operator>>	擬似乱数分布にストリーム入出力を行います Original: performs stream input and output on pseudo-random number distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (機能)

例

#include <iostream>
#include <iomanip>
#include <string>
#include <map>
#include <random>
#include <cmath>
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd());
 
    std::lognormal_distribution<> d(1.6, 0.25);
 
    std::map<int, int> hist;
    for(int n=0; n<10000; ++n) {
        ++hist[std::round(d(gen))];
    }
    for(auto p : hist) {
        std::cout << std::fixed << std::setprecision(1) << std::setw(2)
                  << p.first << ' ' << std::string(p.second/200, '*') << '\n';
    }
}

Output:

2 
 3 ***
 4 *************
 5 ***************
 6 *********
 7 ****
 8 *
 9 
10 
11 
12

外部リンク

• Weisstein, Eric W. "Log Normal Distribution."MathWorldのから - WolframのWebリソース.

  Original:

  Weisstein, Eric W. "Log Normal Distribution." From MathWorld--A Wolfram Web Resource.

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• WikipediaからLog-normal distribution..

  Original:

  Log-normal distribution. From Wikipedia.

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