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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 | ||
20effc67 | 6 | #include "mp_t.hpp" |
7c673cae FG |
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 <boost/math/tools/test_data.hpp> | |
12 | #include <boost/random.hpp> | |
7c673cae FG |
13 | |
14 | using namespace boost::math::tools; | |
15 | ||
16 | // | |
f67539c2 | 17 | // Force truncation to float precision of input values: |
7c673cae FG |
18 | // we must ensure that the input values are exactly representable |
19 | // in whatever type we are testing, or the output values will all | |
20 | // be thrown off: | |
21 | // | |
22 | float external_f; | |
23 | float force_truncate(const float* f) | |
24 | { | |
25 | external_f = *f; | |
26 | return external_f; | |
27 | } | |
28 | ||
29 | float truncate_to_float(mp_t r) | |
30 | { | |
31 | float f = boost::math::tools::real_cast<float>(r); | |
32 | return force_truncate(&f); | |
33 | } | |
34 | ||
35 | boost::mt19937 rnd; | |
36 | boost::uniform_real<float> ur_a(1.0F, 5.0F); | |
37 | boost::variate_generator<boost::mt19937, boost::uniform_real<float> > gen(rnd, ur_a); | |
38 | boost::uniform_real<float> ur_a2(0.0F, 100.0F); | |
39 | boost::variate_generator<boost::mt19937, boost::uniform_real<float> > gen2(rnd, ur_a2); | |
40 | ||
41 | struct ibeta_inv_data_generator | |
42 | { | |
43 | boost::math::tuple<mp_t, mp_t, mp_t, mp_t, mp_t> operator()(mp_t ap, mp_t bp, mp_t x_) | |
44 | { | |
45 | float a = truncate_to_float(real_cast<float>(gen() * pow(mp_t(10), ap))); | |
46 | float b = truncate_to_float(real_cast<float>(gen() * pow(mp_t(10), bp))); | |
47 | float x = truncate_to_float(real_cast<float>(x_)); | |
48 | std::cout << a << " " << b << " " << x << std::flush; | |
49 | mp_t inv = boost::math::ibeta_inv(mp_t(a), mp_t(b), mp_t(x)); | |
50 | std::cout << " " << inv << std::flush; | |
51 | mp_t invc = boost::math::ibetac_inv(mp_t(a), mp_t(b), mp_t(x)); | |
52 | std::cout << " " << invc << std::endl; | |
53 | return boost::math::make_tuple(a, b, x, inv, invc); | |
54 | } | |
55 | }; | |
56 | ||
57 | int main(int argc, char*argv []) | |
58 | { | |
59 | bool cont; | |
60 | std::string line; | |
61 | ||
62 | parameter_info<mp_t> arg1, arg2, arg3; | |
63 | test_data<mp_t> data; | |
64 | ||
65 | std::cout << "Welcome.\n" | |
66 | "This program will generate spot tests for the inverse incomplete beta function:\n" | |
67 | " ibeta_inv(a, p) and ibetac_inv(a, q)\n\n"; | |
68 | ||
69 | arg1 = make_periodic_param(mp_t(-5), mp_t(6), 11); | |
70 | arg2 = make_periodic_param(mp_t(-5), mp_t(6), 11); | |
71 | arg3 = make_random_param(mp_t(0.0001), mp_t(1), 10); | |
72 | ||
73 | arg1.type |= dummy_param; | |
74 | arg2.type |= dummy_param; | |
75 | arg3.type |= dummy_param; | |
76 | ||
77 | data.insert(ibeta_inv_data_generator(), arg1, arg2, arg3); | |
78 | ||
79 | line = "ibeta_inv_data.ipp"; | |
80 | std::ofstream ofs(line.c_str()); | |
81 | ofs << std::scientific << std::setprecision(40); | |
82 | write_code(ofs, data, "ibeta_inv_data"); | |
83 | ||
84 | return 0; | |
85 | } | |
86 |