ceph/src/boost/libs/accumulators/test/weighted_mean.cpp

   1 //  (C) Copyright Eric Niebler 2005.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include <boost/test/unit_test.hpp>
   7 #include <boost/test/floating_point_comparison.hpp>
   8 #include <boost/accumulators/accumulators.hpp>
   9 #include <boost/accumulators/statistics/stats.hpp>
  10 #include <boost/accumulators/statistics/weighted_mean.hpp>
  11 #include <boost/accumulators/statistics/variates/covariate.hpp>
  12
  13 using namespace boost;
  14 using namespace unit_test;
  15 using namespace accumulators;
  16
  17 template<typename T>
  18 void assert_is_double(T const &)
  19 {
  20     BOOST_MPL_ASSERT((is_same<T, double>));
  21 }
  22
  23 ///////////////////////////////////////////////////////////////////////////////
  24 // test_stat
  25 //
  26 void test_stat()
  27 {
  28         accumulator_set<
  29         int
  30       , stats<
  31             tag::weighted_mean
  32           , tag::mean_of_weights
  33           , tag::weighted_mean_of_variates<int, tag::covariate1>
  34         >
  35       , int
  36     > acc, test_acc(sample = 0);
  37
  38     acc(1, weight = 2, covariate1 = 3);
  39     BOOST_CHECK_CLOSE(1., weighted_mean(acc), 1e-5);
  40     BOOST_CHECK_EQUAL(1u, count(acc));
  41     BOOST_CHECK_EQUAL(2, sum(acc));
  42     BOOST_CHECK_CLOSE(2., mean_of_weights(acc), 1e-5);
  43     BOOST_CHECK_CLOSE(3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
  44
  45     acc(0, weight = 4, covariate1 = 4);
  46     BOOST_CHECK_CLOSE(1./3., weighted_mean(acc), 1e-5);
  47     BOOST_CHECK_EQUAL(2u, count(acc));
  48     BOOST_CHECK_EQUAL(2, sum(acc));
  49     BOOST_CHECK_CLOSE(3., mean_of_weights(acc), 1e-5);
  50     BOOST_CHECK_CLOSE(11./3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
  51
  52     acc(2, weight = 9, covariate1 = 8);
  53     BOOST_CHECK_CLOSE(4./3., weighted_mean(acc), 1e-5);
  54     BOOST_CHECK_EQUAL(3u, count(acc));
  55     BOOST_CHECK_EQUAL(20, sum(acc));
  56     BOOST_CHECK_CLOSE(5., mean_of_weights(acc), 1e-5);
  57     BOOST_CHECK_CLOSE(94./15., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
  58
  59     assert_is_double(mean(acc));
  60
  61     accumulator_set<
  62         int
  63       , stats<
  64             tag::weighted_mean(immediate)
  65           , tag::mean_of_weights(immediate)
  66           , tag::weighted_mean_of_variates<int, tag::covariate1>(immediate)
  67         >
  68       , int
  69     > acc2, test_acc2(sample = 0);
  70
  71     acc2(1, weight = 2, covariate1 = 3);
  72     BOOST_CHECK_CLOSE(1., weighted_mean(acc2), 1e-5);
  73     BOOST_CHECK_EQUAL(1u, count(acc2));
  74     BOOST_CHECK_CLOSE(2., mean_of_weights(acc2), 1e-5);
  75     BOOST_CHECK_CLOSE(3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
  76
  77     acc2(0, weight = 4, covariate1 = 4);
  78     BOOST_CHECK_CLOSE(1./3., weighted_mean(acc2), 1e-5);
  79     BOOST_CHECK_EQUAL(2u, count(acc2));
  80     BOOST_CHECK_CLOSE(3., mean_of_weights(acc2), 1e-5);
  81     BOOST_CHECK_CLOSE(11./3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
  82
  83     acc2(2, weight = 9, covariate1 = 8);
  84     BOOST_CHECK_CLOSE(4./3., weighted_mean(acc2), 1e-5);
  85     BOOST_CHECK_EQUAL(3u, count(acc2));
  86     BOOST_CHECK_CLOSE(5., mean_of_weights(acc2), 1e-5);
  87     BOOST_CHECK_CLOSE(94./15., (accumulators::mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
  88
  89     assert_is_double(mean(acc2));
  90 }
  91
  92 ///////////////////////////////////////////////////////////////////////////////
  93 // init_unit_test_suite
  94 //
  95 test_suite* init_unit_test_suite( int argc, char* argv[] )
  96 {
  97     test_suite *test = BOOST_TEST_SUITE("weighted_mean test");
  98
  99     test->add(BOOST_TEST_CASE(&test_stat));
 100
 101     return test;
 102 }