帶示例在 C++ 中負二項式分佈
在本教程中,我們將討論一個程式來了解 C++ 中的負二項式分佈。
此函式遵循負二項式離散分佈,並且根據此隨機分佈生成整數。
示例
#include <bits/stdc++.h>
using namespace std;
int main() {
//setting number of experiments
const int exps = 10000;
const int numberstars = 100;
default_random_engine generator;
negative_binomial_distribution<int> distribution(4, 0.5);
int p[10] = {};
for (int i = 0; i < exps; ++i) {
int counting = distribution(generator);
if (counting < 10)
++p[counting];
}
cout << "Negative binomial distribution with "<< "( k = 4, p = 0.5 ) :" << endl;
//printing the sequence from the array
for (int i = 0; i < 10; ++i)
cout << i << ": " << string(p[i] * numberstars / exps, '*') << endl;
return 0;
}結果
Negative binomial distribution with ( k = 4, p = 0.5 ) : 0: ***** 1: ************ 2: **************** 3: *************** 4: ************* 5: ********** 6: ******** 7: ***** 8: *** 9: **
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