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- // (C) Copyright John Maddock 2006.
- // Use, modification and distribution are subject to the
- // Boost Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- #include <boost/math/special_functions/beta.hpp>
- #include <boost/math/constants/constants.hpp>
- #include <boost/lexical_cast.hpp>
- #include <fstream>
- #include <boost/math/tools/test_data.hpp>
- #include <boost/random.hpp>
- #include "mp_t.hpp"
- using namespace boost::math::tools;
- //
- // Force trunctation to float precision of input values:
- // we must ensure that the input values are exactly representable
- // in whatever type we are testing, or the output values will all
- // be thrown off:
- //
- float external_f;
- float force_truncate(const float* f)
- {
- external_f = *f;
- return external_f;
- }
- float truncate_to_float(mp_t r)
- {
- float f = boost::math::tools::real_cast<float>(r);
- return force_truncate(&f);
- }
- boost::mt19937 rnd;
- boost::uniform_real<float> ur_a(1.0F, 5.0F);
- boost::variate_generator<boost::mt19937, boost::uniform_real<float> > gen(rnd, ur_a);
- boost::uniform_real<float> ur_a2(0.0F, 100.0F);
- boost::variate_generator<boost::mt19937, boost::uniform_real<float> > gen2(rnd, ur_a2);
- struct ibeta_inv_data_generator
- {
- boost::math::tuple<mp_t, mp_t, mp_t, mp_t, mp_t, mp_t, mp_t> operator()
- (mp_t bp, mp_t x_, mp_t p_)
- {
- float b = truncate_to_float(real_cast<float>(gen() * pow(mp_t(10), bp)));
- float x = truncate_to_float(real_cast<float>(x_));
- float p = truncate_to_float(real_cast<float>(p_));
- std::cout << b << " " << x << " " << p << std::flush;
- mp_t inv = boost::math::ibeta_inva(mp_t(b), mp_t(x), mp_t(p));
- std::cout << " " << inv << std::flush;
- mp_t invc = boost::math::ibetac_inva(mp_t(b), mp_t(x), mp_t(p));
- std::cout << " " << invc << std::endl;
- mp_t invb = boost::math::ibeta_invb(mp_t(b), mp_t(x), mp_t(p));
- std::cout << " " << invb << std::flush;
- mp_t invbc = boost::math::ibetac_invb(mp_t(b), mp_t(x), mp_t(p));
- std::cout << " " << invbc << std::endl;
- return boost::math::make_tuple(b, x, p, inv, invc, invb, invbc);
- }
- };
- int main(int argc, char*argv [])
- {
- bool cont;
- std::string line;
- parameter_info<mp_t> arg1, arg2, arg3;
- test_data<mp_t> data;
- std::cout << "Welcome.\n"
- "This program will generate spot tests for the inverse incomplete beta function:\n"
- " ibeta_inva(a, p) and ibetac_inva(a, q)\n\n";
- arg1 = make_periodic_param(mp_t(-5), mp_t(6), 11);
- arg2 = make_random_param(mp_t(0.0001), mp_t(1), 10);
- arg3 = make_random_param(mp_t(0.0001), mp_t(1), 10);
- arg1.type |= dummy_param;
- arg2.type |= dummy_param;
- arg3.type |= dummy_param;
- data.insert(ibeta_inv_data_generator(), arg1, arg2, arg3);
- line = "ibeta_inva_data.ipp";
- std::ofstream ofs(line.c_str());
- ofs << std::scientific << std::setprecision(40);
- write_code(ofs, data, "ibeta_inva_data");
-
- return 0;
- }
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