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Struct template skewness_impl

boost::accumulators::impl::skewness_impl — Skewness estimation.


// In header: <boost/accumulators/statistics_fwd.hpp>

template<typename Sample> 
struct skewness_impl : public accumulator_base {
  // construct/copy/destruct

  // public member functions
  template<typename Args> result_type result(Args const &) const;
  template<typename Archive> void serialize(Archive &, const unsigned int);


The skewness of a sample distribution is defined as the ratio of the 3rd central moment and the -th power of the 2nd central moment (the variance) of the samples 3. The skewness can also be expressed by the simple moments:

Equation 1.30. 

where are the -th moment and the mean (first moment) of the samples.

skewness_impl public construct/copy/destruct

  1. skewness_impl(dont_care);

skewness_impl public member functions

  1. template<typename Args> result_type result(Args const & args) const;
  2. template<typename Archive> 
      void serialize(Archive & ar, const unsigned int file_version);