| // (C) Copyright 2006 Eric Niebler, Olivier Gygi |
| // 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/test/unit_test.hpp> |
| #include <boost/test/floating_point_comparison.hpp> |
| #include <boost/random.hpp> |
| #include <boost/accumulators/accumulators.hpp> |
| #include <boost/accumulators/statistics/stats.hpp> |
| #include <boost/accumulators/statistics/median.hpp> |
| |
| using namespace boost; |
| using namespace unit_test; |
| using namespace accumulators; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // test_stat |
| // |
| void test_stat() |
| { |
| // two random number generators |
| double mu = 1.; |
| boost::lagged_fibonacci607 rng; |
| boost::normal_distribution<> mean_sigma(mu,1); |
| boost::variate_generator<boost::lagged_fibonacci607&, boost::normal_distribution<> > normal(rng, mean_sigma); |
| |
| accumulator_set<double, stats<tag::median(with_p_square_quantile) > > acc; |
| accumulator_set<double, stats<tag::median(with_density) > > |
| acc_dens( density_cache_size = 10000, density_num_bins = 1000 ); |
| accumulator_set<double, stats<tag::median(with_p_square_cumulative_distribution) > > |
| acc_cdist( p_square_cumulative_distribution_num_cells = 100 ); |
| |
| for (std::size_t i=0; i<100000; ++i) |
| { |
| double sample = normal(); |
| acc(sample); |
| acc_dens(sample); |
| acc_cdist(sample); |
| } |
| |
| BOOST_CHECK_CLOSE(1., median(acc), 1.); |
| BOOST_CHECK_CLOSE(1., median(acc_dens), 1.); |
| BOOST_CHECK_CLOSE(1., median(acc_cdist), 3.); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // init_unit_test_suite |
| // |
| test_suite* init_unit_test_suite( int argc, char* argv[] ) |
| { |
| test_suite *test = BOOST_TEST_SUITE("median test"); |
| |
| test->add(BOOST_TEST_CASE(&test_stat)); |
| |
| return test; |
| } |