ceph/src/boost/libs/math/tools/hypergeometric_dist_data.cpp

   1 //  (C) Copyright John Maddock 2009.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //#define BOOST_MATH_INSTRUMENT
   7
   8 #include "mp_t.hpp"
   9 #include <boost/math/distributions/hypergeometric.hpp>
  10 #include <boost/math/special_functions/trunc.hpp>
  11 #include <boost/math/constants/constants.hpp>
  12 #include <boost/lexical_cast.hpp>
  13 #include <boost/random/uniform_int.hpp>
  14 #include <fstream>
  15 #include <boost/math/tools/test_data.hpp>
  16
  17 using namespace boost::math::tools;
  18
  19 std::mt19937 rnd;
  20
  21 struct hypergeometric_generator
  22 {
  23    boost::math::tuple<
  24       mp_t,
  25       mp_t,
  26       mp_t,
  27       mp_t,
  28       mp_t,
  29       mp_t,
  30       mp_t> operator()(mp_t rN, mp_t rr, mp_t rn)
  31    {
  32       using namespace std;
  33       using namespace boost;
  34       using namespace boost::math;
  35
  36       if((rr > rN) || (rr < rn))
  37          throw std::domain_error("");
  38
  39       try{
  40          int N = itrunc(rN);
  41          int r = itrunc(rr);
  42          int n = itrunc(rn);
  43          boost::uniform_int<> ui((std::max)(0, n + r - N), (std::min)(n, r));
  44          int k = ui(rnd);
  45
  46          hypergeometric_distribution<mp_t> d(r, n, N);
  47
  48          mp_t p = pdf(d, k);
  49          if((p == 1) || (p == 0))
  50          {
  51             // trivial case, don't clutter up our table with it:
  52             throw std::domain_error("");
  53          }
  54          mp_t c = cdf(d, k);
  55          mp_t cc = cdf(complement(d, k));
  56
  57          std::cout << "N = " << N << " r = " << r << " n = " << n << " PDF = " << p << " CDF = " << c << " CCDF = " << cc << std::endl;
  58
  59          return boost::math::make_tuple(r, n, N, k, p, c, cc);
  60       }
  61       catch(const std::exception& e)
  62       {
  63          std::cout << e.what() << std::endl;
  64          throw std::domain_error("");
  65       }
  66    }
  67 };
  68
  69 int main(int argc, char*argv [])
  70 {
  71    std::string line;
  72    parameter_info<mp_t> arg1, arg2, arg3;
  73    test_data<mp_t> data;
  74
  75    std::cout << "Welcome.\n"
  76       "This program will generate spot tests hypergeoemtric distribution:\n";
  77
  78    arg1 = make_power_param(mp_t(0), 1, 21);
  79    arg2 = make_power_param(mp_t(0), 1, 21);
  80    arg3 = make_power_param(mp_t(0), 1, 21);
  81
  82    arg1.type |= dummy_param;
  83    arg2.type |= dummy_param;
  84    arg3.type |= dummy_param;
  85
  86    data.insert(hypergeometric_generator(), arg1, arg2, arg3);
  87
  88    line = "hypergeometric_dist_data2.ipp";
  89    std::ofstream ofs(line.c_str());
  90    ofs << std::scientific << std::setprecision(40);
  91    write_code(ofs, data, "hypergeometric_dist_data2");
  92
  93    return 0;
  94 }
  95