| // (C) Copyright Simon West 2011. |
| // 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/accumulators/accumulators.hpp> |
| #include <boost/accumulators/statistics/stats.hpp> |
| #include <boost/accumulators/statistics/weighted_sum_kahan.hpp> |
| #include <boost/accumulators/statistics/variates/covariate.hpp> |
| |
| using namespace boost; |
| using namespace unit_test; |
| using namespace accumulators; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // test_weighted_sum_kahan |
| // |
| void test_weighted_sum_kahan() |
| { |
| accumulator_set<float, stats<tag::weighted_sum_kahan>, float > acc; |
| |
| BOOST_CHECK_EQUAL(0.0f, weighted_sum_kahan(acc)); |
| |
| for (size_t i = 0; i < 1e6; ++i) { |
| acc(1, weight = 1e-6f); |
| } |
| |
| BOOST_CHECK_EQUAL(1.0f, weighted_sum_kahan(acc)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // test_weighted_sum_of_variates_kahan |
| // |
| void test_weighted_sum_of_variates_kahan() |
| { |
| accumulator_set< |
| float, |
| stats<tag::weighted_sum_of_variates_kahan<float, tag::covariate1> >, |
| float |
| > |
| acc; |
| |
| BOOST_CHECK_EQUAL(0.0f, weighted_sum_of_variates_kahan(acc)); |
| |
| for (size_t i = 0; i < 1e6; ++i) { |
| acc(0, weight = 1.0f, covariate1 = 1e-6f); |
| } |
| |
| BOOST_CHECK_EQUAL(1.0f, weighted_sum_of_variates_kahan(acc)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // init_unit_test_suite |
| // |
| test_suite* init_unit_test_suite( int argc, char* argv[] ) |
| { |
| test_suite *test = BOOST_TEST_SUITE("weighted sum kahan tests"); |
| |
| test->add(BOOST_TEST_CASE(&test_weighted_sum_kahan)); |
| test->add(BOOST_TEST_CASE(&test_weighted_sum_of_variates_kahan)); |
| |
| return test; |
| } |