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Struct template lazy_variance_impl

boost::accumulators::impl::lazy_variance_impl — Lazy calculation of variance.

Synopsis

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

template<typename Sample, typename MeanFeature> 
struct lazy_variance_impl : public  {
  // types
  typedef  ;

  // construct/copy/destruct
  ();

  // public member functions
  template<typename Args>  () ;
  template<typename Archive>  (, );
};

Description

Default sample variance implementation based on the second moment moment<2>, mean and count.

Equation 1.29. 


where

Equation 1.30. 


is the estimate of the sample mean and is the number of samples.

lazy_variance_impl public construct/copy/destruct

  1. ();

lazy_variance_impl public member functions

  1. template<typename Args>  ( args) ;
  2. template<typename Archive> 
       ( ar,  file_version);

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