| /////////////////////////////////////////////////////////////////////////////// |
| // error_of.hpp |
| // |
| // Copyright 2005 Eric Niebler. Distributed under 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) |
| |
| #ifndef BOOST_ACCUMULATORS_STATISTICS_ERROR_OF_MEAN_HPP_EAN_27_03_2006 |
| #define BOOST_ACCUMULATORS_STATISTICS_ERROR_OF_MEAN_HPP_EAN_27_03_2006 |
| |
| #include <boost/mpl/placeholders.hpp> |
| #include <boost/accumulators/framework/accumulator_base.hpp> |
| #include <boost/accumulators/framework/extractor.hpp> |
| #include <boost/accumulators/framework/depends_on.hpp> |
| #include <boost/accumulators/statistics_fwd.hpp> |
| #include <boost/accumulators/statistics/error_of.hpp> |
| #include <boost/accumulators/statistics/variance.hpp> |
| #include <boost/accumulators/statistics/count.hpp> |
| |
| namespace boost { namespace accumulators |
| { |
| |
| namespace impl |
| { |
| /////////////////////////////////////////////////////////////////////////////// |
| // error_of_mean_impl |
| template<typename Sample, typename Variance> |
| struct error_of_mean_impl |
| : accumulator_base |
| { |
| // for boost::result_of |
| typedef typename numeric::functional::average<Sample, std::size_t>::result_type result_type; |
| |
| error_of_mean_impl(dont_care) {} |
| |
| template<typename Args> |
| result_type result(Args const &args) const |
| { |
| using namespace std; |
| extractor<Variance> const variance = {}; |
| return sqrt(numeric::average(variance(args), count(args) - 1)); |
| } |
| }; |
| |
| } // namespace impl |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // tag::error_of |
| // |
| namespace tag |
| { |
| template<> |
| struct error_of<mean> |
| : depends_on<lazy_variance, count> |
| { |
| /// INTERNAL ONLY |
| /// |
| typedef accumulators::impl::error_of_mean_impl<mpl::_1, lazy_variance> impl; |
| }; |
| |
| template<> |
| struct error_of<immediate_mean> |
| : depends_on<variance, count> |
| { |
| /// INTERNAL ONLY |
| /// |
| typedef accumulators::impl::error_of_mean_impl<mpl::_1, variance> impl; |
| }; |
| } |
| |
| }} // namespace boost::accumulators |
| |
| #endif |