114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
// (C) Copyright John Maddock 2006.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#define BOOST_MATH_MAX_SERIES_ITERATION_POLICY 10000000
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#include <boost/math/constants/constants.hpp>
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#include <boost/lexical_cast.hpp>
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#include <fstream>
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#include <map>
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#include <boost/math/tools/test_data.hpp>
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#include <boost/random.hpp>
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#include "mp_t.hpp"
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using namespace boost::math::tools;
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using namespace boost::math;
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using namespace std;
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struct hypergeometric_0f2_gen
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{
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mp_t operator()(mp_t b1, mp_t b2, mp_t z)
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{
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mp_t result = 0;
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mp_t abs_result = 0;
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mp_t term = 1;
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mp_t k = 0;
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do
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{
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result += term;
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abs_result += fabs(term);
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if (fabs(result) * boost::math::tools::epsilon<mp_t>() > fabs(term))
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break;
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++k;
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term /= b1++;
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term /= b2++;
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term /= k;
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term *= z;
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} while (true);
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//
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// check precision:
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//
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if (abs_result * boost::math::tools::epsilon<mp_t>() / fabs(result) > 1e-40)
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throw std::domain_error("Unable to calculate result");
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std::cout << b1 << " " << b2 << " " << z << " " << result << std::endl;
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return result;
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}
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};
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int main(int, char* [])
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{
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parameter_info<mp_t> arg1, arg2, arg3, arg4;
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test_data<mp_t> data;
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std::cout << "Welcome.\n"
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"This program will generate spot tests for 2F0:\n";
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std::string line;
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bool cont = true;
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while (cont)
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{
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float range;
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std::cout << "Enter the range to calculate over for b1 and b2 (single value, range will be -x to x): ";
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std::cin >> range;
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float z_range;
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std::cout << "Enter the range to calculate over for z (single value, range will be -x to x): ";
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std::cin >> z_range;
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int num_spots;
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std::cout << "Enter how many test points to calculate: ";
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std::cin >> num_spots;
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std::vector<mp_t> v;
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random_ns::mt19937 rnd;
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random_ns::uniform_real_distribution<float> ur_a(-range, range);
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random_ns::uniform_real_distribution<float> ur_z(-z_range, z_range);
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do
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{
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mp_t b1 = ur_a(rnd);
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mp_t b2 = ur_a(rnd);
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mp_t z = ur_z(rnd);
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arg1 = make_single_param(b1);
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arg2 = make_single_param(b2);
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arg3 = make_single_param(z);
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data.insert(hypergeometric_0f2_gen(), arg1, arg2, arg3);
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} while (num_spots--);
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std::cout << "Any more data?";
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std::cin >> cont;
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}
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std::cout << "Enter name of test data file [default=hypergeometric_0f2.ipp]";
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std::getline(std::cin, line);
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boost::algorithm::trim(line);
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if(line == "")
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line = "hypergeometric_0f2.ipp";
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std::ofstream ofs(line.c_str());
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ofs << std::scientific << std::setprecision(40);
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write_code(ofs, data, line.c_str());
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return 0;
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}
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