| // (C) Copyright Eric Niebler 2005. |
| // 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/accumulators/accumulators.hpp> |
| #include <boost/accumulators/statistics/stats.hpp> |
| #include <boost/accumulators/statistics/weighted_mean.hpp> |
| |
| using namespace boost; |
| using namespace unit_test; |
| using namespace accumulators; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // test_stat |
| // |
| void test_stat() |
| { |
| accumulator_set<int, stats<tag::weighted_mean>, external<int> > acc; |
| accumulator_set<void, stats<tag::sum_of_weights>, int> weight_acc; |
| |
| acc(10, weight = 2); // 20 |
| weight_acc(weight = 2); // |
| BOOST_CHECK_EQUAL(2, sum_of_weights(weight_acc)); // |
| // |
| acc(6, weight = 3); // 18 |
| weight_acc(weight = 3); // |
| BOOST_CHECK_EQUAL(5, sum_of_weights(weight_acc)); // |
| // |
| acc(4, weight = 4); // 16 |
| weight_acc(weight = 4); // |
| BOOST_CHECK_EQUAL(9, sum_of_weights(weight_acc)); // |
| // |
| acc(6, weight = 5); //+ 30 |
| weight_acc(weight = 5); // |
| BOOST_CHECK_EQUAL(14, sum_of_weights(weight_acc)); // |
| //= 84 / 14 = 6 |
| |
| BOOST_CHECK_CLOSE(6., weighted_mean(acc, weights = weight_acc), 1e-5); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // init_unit_test_suite |
| // |
| test_suite* init_unit_test_suite( int argc, char* argv[] ) |
| { |
| test_suite *test = BOOST_TEST_SUITE("external_weights test"); |
| |
| test->add(BOOST_TEST_CASE(&test_stat)); |
| |
| return test; |
| } |