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- // (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>
- #include <sstream>
- #include <boost/archive/text_oarchive.hpp>
- #include <boost/archive/text_iarchive.hpp>
- using namespace boost;
- using namespace unit_test;
- using namespace accumulators;
- typedef accumulator_set<double, stats<tag::median(with_p_square_quantile) > > p_square_median_t;
- typedef accumulator_set<double, stats<tag::median(with_density) > > dist_median_t;
- typedef accumulator_set<double, stats<tag::median(with_p_square_cumulative_distribution) > > p_square_dist_median_t;
- ///////////////////////////////////////////////////////////////////////////////
- // 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);
- p_square_median_t acc;
- dist_median_t acc_dens( density_cache_size = 10000, density_num_bins = 1000 );
- p_square_dist_median_t 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.);
- }
- ///////////////////////////////////////////////////////////////////////////////
- // test_persistency
- //
- void test_persistency()
- {
- // 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);
- std::stringstream ss;
- {
- p_square_median_t acc;
- dist_median_t acc_dens( density_cache_size = 10000, density_num_bins = 1000 );
- p_square_dist_median_t 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.);
- boost::archive::text_oarchive oa(ss);
- acc.serialize(oa, 0);
- acc_dens.serialize(oa, 0);
- acc_cdist.serialize(oa, 0);
- }
- p_square_median_t acc;
- dist_median_t acc_dens( density_cache_size = 10000, density_num_bins = 1000 );
- p_square_dist_median_t acc_cdist( p_square_cumulative_distribution_num_cells = 100 );
- boost::archive::text_iarchive ia(ss);
- acc.serialize(ia, 0);
- acc_dens.serialize(ia, 0);
- acc_cdist.serialize(ia, 0);
- 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));
- test->add(BOOST_TEST_CASE(&test_persistency));
- return test;
- }
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