ActsTrk::detail::SumOfValues Class Reference

Helper class to gather statistics and compute the biased variance. More...

#include <HitSummaryDataUtils.h>

Collaboration diagram for ActsTrk::detail::SumOfValues:

Public Member Functions
void	reset ()
void	add (double value)
std::array< double, 2 >	meanAndBiasedVariance () const
double	biasedVariance () const

Private Attributes
double	m_sum = 0.
double	m_sum2 = 0.
unsigned int	m_n =0u

Detailed Description

Helper class to gather statistics and compute the biased variance.

Definition at line 235 of file HitSummaryDataUtils.h.

Member Function Documentation

add()

void ActsTrk::detail::SumOfValues::add ( double  value )

inline

Definition at line 246 of file HitSummaryDataUtils.h.

                             {
         m_sum += value;
         m_sum2 += value * value;
         ++m_n;
      }

biasedVariance()

double ActsTrk::detail::SumOfValues::biasedVariance ( ) const

inline

Definition at line 256 of file HitSummaryDataUtils.h.

                                    {
         double inv_n = m_n>0 ? 1./m_n : 0 ;
         return (m_sum2 - m_sum * m_sum *inv_n) * inv_n;
      }

meanAndBiasedVariance()

std::array<double,2> ActsTrk::detail::SumOfValues::meanAndBiasedVariance ( ) const

inline

Definition at line 251 of file HitSummaryDataUtils.h.

                                                       {
         double inv_n = m_n>0 ? 1/m_n : 0 ;
         double mean = m_sum * inv_n;
         return std::array<double, 2> { mean, (m_sum2 - m_sum * mean) * inv_n };
      }

reset()

void ActsTrk::detail::SumOfValues::reset ( )

inline

Definition at line 241 of file HitSummaryDataUtils.h.

                   {
         m_sum=0.;
         m_sum2=0.;
         m_n=0u;
      }

Member Data Documentation

m_n

unsigned int ActsTrk::detail::SumOfValues::m_n =0u

private

Definition at line 239 of file HitSummaryDataUtils.h.

m_sum

double ActsTrk::detail::SumOfValues::m_sum = 0.

private

Definition at line 237 of file HitSummaryDataUtils.h.

m_sum2

double ActsTrk::detail::SumOfValues::m_sum2 = 0.

private

Definition at line 238 of file HitSummaryDataUtils.h.

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The documentation for this class was generated from the following file:

• HitSummaryDataUtils.h