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

   1 //  (C) Copyright John Maddock 2006.
   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 #include <boost/math/special_functions/gamma.hpp>
   7 #include <boost/math/special_functions/beta.hpp>
   8 #include <boost/math/constants/constants.hpp>
   9 #include <boost/lexical_cast.hpp>
  10 #include <fstream>
  11 #include <map>
  12 #include <boost/math/tools/test_data.hpp>
  13 #include <boost/random.hpp>
  14 #include "mp_t.hpp"
  15
  16 using namespace boost::math::tools;
  17 using namespace boost::math;
  18 using namespace std;
  19
  20 #include <libs/math/test/table_type.hpp>
  21
  22 #define T double
  23 #define SC_(x) static_cast<double>(x)
  24 #include <libs/math/test/ibeta_int_data.ipp>
  25
  26 int main(int, char* [])
  27 {
  28    std::cout << "Enter name of test data file [default=ibeta_derivative_data.ipp]";
  29    std::string line;
  30    std::getline(std::cin, line);
  31    boost::algorithm::trim(line);
  32    if(line == "")
  33       line = "ibeta_derivative_data.ipp";
  34    std::ofstream ofs(line.c_str());
  35    ofs << std::scientific << std::setprecision(40);
  36
  37    ofs <<
  38       "//  (C) Copyright John Maddock 2006.\n"
  39       "//  Use, modification and distribution are subject to the\n"
  40       "//  Boost Software License, Version 1.0. (See accompanying file\n"
  41       "//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)\n"
  42       "\n\n"
  43       "static const boost::array<boost::array<typename table_type<T>::type, 4>, " << ibeta_int_data.size() << "> ibeta_derivative_small_data = { {\n";
  44
  45
  46    for(unsigned i = 0; i < ibeta_int_data.size(); ++i)
  47    {
  48       mp_t a(ibeta_int_data[i][0]);
  49       mp_t b(ibeta_int_data[i][1]);
  50       mp_t x(ibeta_int_data[i][2]);
  51
  52       std::cout << a << std::endl;
  53       std::cout << b << std::endl;
  54       std::cout << x << std::endl;
  55
  56       mp_t bet = exp(boost::math::lgamma(a) + boost::math::lgamma(b) - boost::math::lgamma(a + b));
  57       mp_t d = pow(1 - x, b - 1) * pow(x, a - 1) / bet;
  58
  59       ofs << "{{ SC_(" << a << "), SC_(" << b << "), SC_(" << x << "), SC_(" << d << ") }}\n";
  60    }
  61
  62    ofs << "}};\n\n";
  63
  64
  65    return 0;
  66 }
  67
  68