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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/tools/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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