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boost::accumulators::impl::non_coherent_weighted_tail_mean_impl — Estimation of the (non-coherent) weighted tail mean based on order statistics (for both left and right tails)
// In header: <boost/accumulators/statistics_fwd.hpp> template<typename Sample, typename Weight, typename LeftRight> struct non_coherent_weighted_tail_mean_impl : public accumulator_base { // construct/copy/destruct non_coherent_weighted_tail_mean_impl(dont_care); // public member functions template<typename Args> result_type result(Args const &) const; };
An estimation of the non-coherent, weighted tail mean  is given by the weighted mean of the
 is given by the weighted mean of the
smallest samples (left tail) or the weighted mean of the
largest samples (right tail) above a quantile  of level
 of level  ,
,  being the total number of sample and
 being the total number of sample and  the sum of all
 the sum of all  weights:
 weights: