c++ - 将 gsl_ran_hypergeometric_pdf(k, n1, n2, t) 翻译成 boost::math::hypergeometric_distribution

Question

如何翻译这个使用超几何的 C++ 程序来自 GNU Scientific Library 的分布函数

http://www.gnu.org/software/gsl/manual/html_node/The-Hypergeometric-Distribution.html

进入一个 C++ 程序，该程序使用来自 Boost library 的类似函数？

#include <cstdlib>
#include <iostream>
#include <gsl/gsl_randist.h>
#include <gsl/gsl_cdf.h>

int main(int argc,char *argv[]) {
  unsigned int n1 = 256;
  unsigned int n2 = 1583;
  unsigned int t = 300;
  unsigned int k = 40;
  std::cout << gsl_ran_hypergeometric_pdf(k, n1, n2, t)
            << std::endl
            << gsl_cdf_hypergeometric_P(k, n1, n2, t)
            << std::endl;
  return EXIT_SUCCESS;
}

Answer 1

这是对 Boost 函数的翻译:

#include <cstdlib>
#include <iostream>
#include <boost/math/distributions/hypergeometric.hpp>
#include <boost/math/policies/policy.hpp>

int main(int argc, char *argv[]) {
  unsigned int n1 = 256;
  unsigned int n2 = 1583;
  unsigned int t = 300;
  unsigned int k = 40;
  boost::math::hypergeometric_distribution<double> hg_dist(n1, t, n1 + n2);
  std::cout << boost::math::pdf<double>(hg_dist, k)
            << std::endl
            << boost::math::cdf<double>(hg_dist, k)
            << std::endl;
  return EXIT_SUCCESS;
}

更多信息见 http://www.boost.org/doc/libs/1_52_0/libs/math/doc/sf_and_dist/html/math_toolkit/dist/dist_ref/dists/hypergeometric_dist.html