123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108 |
- /* test_bernoulli.cpp
- *
- * Copyright Steven Watanabe 2011
- * Distributed under 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)
- *
- * $Id$
- *
- */
- #include <boost/random/bernoulli_distribution.hpp>
- #include <boost/random/uniform_int.hpp>
- #include <boost/random/uniform_01.hpp>
- #include <boost/random/mersenne_twister.hpp>
- #include <boost/math/distributions/binomial.hpp>
- #include <boost/lexical_cast.hpp>
- #include <boost/exception/diagnostic_information.hpp>
- #include <vector>
- #include <iostream>
- #include <numeric>
- #include "chi_squared_test.hpp"
- bool do_test(double p, long long max) {
- std::cout << "running bernoulli(" << p << ")" << " " << max << " times: " << std::flush;
- boost::math::binomial expected(static_cast<double>(max), p);
-
- boost::random::bernoulli_distribution<> dist(p);
- boost::mt19937 gen;
- long long count = 0;
- for(long long i = 0; i < max; ++i) {
- if(dist(gen)) ++count;
- }
- double prob = cdf(expected, count);
- bool result = prob < 0.99 && prob > 0.01;
- const char* err = result? "" : "*";
- std::cout << std::setprecision(17) << prob << err << std::endl;
- std::cout << std::setprecision(6);
- return result;
- }
- bool do_tests(int repeat, long long trials) {
- boost::mt19937 gen;
- boost::uniform_01<> rdist;
- int errors = 0;
- for(int i = 0; i < repeat; ++i) {
- if(!do_test(rdist(gen), trials)) {
- ++errors;
- }
- }
- if(errors != 0) {
- std::cout << "*** " << errors << " errors detected ***" << std::endl;
- }
- return errors == 0;
- }
- int usage() {
- std::cerr << "Usage: test_bernoulli_distribution -r <repeat> -t <trials>" << std::endl;
- return 2;
- }
- template<class T>
- bool handle_option(int& argc, char**& argv, char opt, T& value) {
- if(argv[0][1] == opt && argc > 1) {
- --argc;
- ++argv;
- value = boost::lexical_cast<T>(argv[0]);
- return true;
- } else {
- return false;
- }
- }
- int main(int argc, char** argv) {
- int repeat = 10;
- long long trials = 1000000ll;
- if(argc > 0) {
- --argc;
- ++argv;
- }
- while(argc > 0) {
- if(argv[0][0] != '-') return usage();
- else if(!handle_option(argc, argv, 'r', repeat)
- && !handle_option(argc, argv, 't', trials)) {
- return usage();
- }
- --argc;
- ++argv;
- }
- try {
- if(do_tests(repeat, trials)) {
- return 0;
- } else {
- return EXIT_FAILURE;
- }
- } catch(...) {
- std::cerr << boost::current_exception_diagnostic_information() << std::endl;
- return EXIT_FAILURE;
- }
- }
|