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## Struct template non_coherent_weighted_tail_mean_impl

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).

## Synopsis

    // In header: <boost/accumulators/statistics/weighted_tail_mean.hpp>

    template<typename Sample, typename Weight, typename LeftRight>
    struct non_coherent_weighted_tail_mean_impl {
      // types
      typedef numeric::functional::multiplies< Sample, Weight >::result_type            weighted_sample;
      typedef numeric::functional::average< Weight, std::size_t >::result_type          float_type;
      typedef numeric::functional::average< weighted_sample, std::size_t >::result_type result_type;

      // construct/copy/destruct
      non_coherent_weighted_tail_mean_impl(dont_care);

      // public member functions
      template<typename Args> result_type result(Args const &) const;
    };

## Description

An estimation of the non-coherent, weighted tail mean is given by the weighted mean of the

Equation 1.30.

smallest samples (left tail) or the weighted mean of the

Equation 1.31.

largest samples (right tail) above a quantile of level , being the total number of sample and the sum of all weights:

Equation 1.32.

Equation 1.33.

### `non_coherent_weighted_tail_mean_impl` public construct/copy/destruct

1.     non_coherent_weighted_tail_mean_impl(dont_care);

### `non_coherent_weighted_tail_mean_impl` public member functions

1.     template<typename Args> result_type result(Args const & args) const;