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- // (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>
- #include <boost/accumulators/statistics/variates/covariate.hpp>
- using namespace boost;
- using namespace unit_test;
- using namespace accumulators;
- template<typename T>
- void assert_is_double(T const &)
- {
- BOOST_MPL_ASSERT((is_same<T, double>));
- }
- ///////////////////////////////////////////////////////////////////////////////
- // test_stat
- //
- void test_stat()
- {
- accumulator_set<
- int
- , stats<
- tag::weighted_mean
- , tag::mean_of_weights
- , tag::weighted_mean_of_variates<int, tag::covariate1>
- >
- , int
- > acc, test_acc(sample = 0);
- acc(1, weight = 2, covariate1 = 3);
- BOOST_CHECK_CLOSE(1., weighted_mean(acc), 1e-5);
- BOOST_CHECK_EQUAL(1u, count(acc));
- BOOST_CHECK_EQUAL(2, sum(acc));
- BOOST_CHECK_CLOSE(2., mean_of_weights(acc), 1e-5);
- BOOST_CHECK_CLOSE(3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
- acc(0, weight = 4, covariate1 = 4);
- BOOST_CHECK_CLOSE(1./3., weighted_mean(acc), 1e-5);
- BOOST_CHECK_EQUAL(2u, count(acc));
- BOOST_CHECK_EQUAL(2, sum(acc));
- BOOST_CHECK_CLOSE(3., mean_of_weights(acc), 1e-5);
- BOOST_CHECK_CLOSE(11./3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
- acc(2, weight = 9, covariate1 = 8);
- BOOST_CHECK_CLOSE(4./3., weighted_mean(acc), 1e-5);
- BOOST_CHECK_EQUAL(3u, count(acc));
- BOOST_CHECK_EQUAL(20, sum(acc));
- BOOST_CHECK_CLOSE(5., mean_of_weights(acc), 1e-5);
- BOOST_CHECK_CLOSE(94./15., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
- assert_is_double(mean(acc));
- accumulator_set<
- int
- , stats<
- tag::weighted_mean(immediate)
- , tag::mean_of_weights(immediate)
- , tag::weighted_mean_of_variates<int, tag::covariate1>(immediate)
- >
- , int
- > acc2, test_acc2(sample = 0);
- acc2(1, weight = 2, covariate1 = 3);
- BOOST_CHECK_CLOSE(1., weighted_mean(acc2), 1e-5);
- BOOST_CHECK_EQUAL(1u, count(acc2));
- BOOST_CHECK_CLOSE(2., mean_of_weights(acc2), 1e-5);
- BOOST_CHECK_CLOSE(3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
- acc2(0, weight = 4, covariate1 = 4);
- BOOST_CHECK_CLOSE(1./3., weighted_mean(acc2), 1e-5);
- BOOST_CHECK_EQUAL(2u, count(acc2));
- BOOST_CHECK_CLOSE(3., mean_of_weights(acc2), 1e-5);
- BOOST_CHECK_CLOSE(11./3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
- acc2(2, weight = 9, covariate1 = 8);
- BOOST_CHECK_CLOSE(4./3., weighted_mean(acc2), 1e-5);
- BOOST_CHECK_EQUAL(3u, count(acc2));
- BOOST_CHECK_CLOSE(5., mean_of_weights(acc2), 1e-5);
- BOOST_CHECK_CLOSE(94./15., (accumulators::mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
- assert_is_double(mean(acc2));
- }
- ///////////////////////////////////////////////////////////////////////////////
- // init_unit_test_suite
- //
- test_suite* init_unit_test_suite( int argc, char* argv[] )
- {
- test_suite *test = BOOST_TEST_SUITE("weighted_mean test");
- test->add(BOOST_TEST_CASE(&test_stat));
- return test;
- }
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