Acts::detail::covariance_helper< CovMatrix_t, NumIter > Struct Template Reference

check and correct covariance matrix More...

#include <acts/blob/sPHENIX/Core/include/Acts/EventData/detail/covariance_helper.hpp>

Static Public Member Functions
static bool	validate (CovMatrix_t &covariance)
	check if the covariance is semi-positive and correction is attempted
static bool	isSemiPositive (const CovMatrix_t &covariance)
	check if the covariance is semi-positive
static bool	isPositive (const CovMatrix_t &covariance)
	check if the covariance is positive

Detailed Description

template<typename CovMatrix_t, signed int NumIter = 1>
struct Acts::detail::covariance_helper< CovMatrix_t, NumIter >

check and correct covariance matrix

Template Parameters

CovMatrix_t	The type of covariance matrix
NumIter	The number of iterations to run the correction

Invocation:

• covariance_helper<CovMatrix_t, numIter>::validate(covariance) The 'covariance' is checked against semi-positivedefiniteness and limited number of iterations to replace it with the closest semi-positivedefinite are made if it's not

Returns

The (corrected) covariance is semi-positivedefinite or not

Definition at line 30 of file covariance_helper.hpp.

View newest version in sPHENIX GitHub at line 30 of file covariance_helper.hpp

Member Function Documentation

template<typename CovMatrix_t , signed int NumIter = 1>

static bool Acts::detail::covariance_helper< CovMatrix_t, NumIter >::isPositive ( const CovMatrix_t &  covariance )

inlinestatic

check if the covariance is positive

Definition at line 64 of file covariance_helper.hpp.

View newest version in sPHENIX GitHub at line 64 of file covariance_helper.hpp

template<typename CovMatrix_t , signed int NumIter = 1>

static bool Acts::detail::covariance_helper< CovMatrix_t, NumIter >::isSemiPositive ( const CovMatrix_t &  covariance )

inlinestatic

check if the covariance is semi-positive

Definition at line 55 of file covariance_helper.hpp.

View newest version in sPHENIX GitHub at line 55 of file covariance_helper.hpp

Referenced by Acts::detail::covariance_helper< CovMatrix_t, NumIter >::validate().

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template<typename CovMatrix_t , signed int NumIter = 1>

static bool Acts::detail::covariance_helper< CovMatrix_t, NumIter >::validate ( CovMatrix_t &  covariance )

inlinestatic

check if the covariance is semi-positive and correction is attempted

check again after the iterations

Definition at line 32 of file covariance_helper.hpp.

View newest version in sPHENIX GitHub at line 32 of file covariance_helper.hpp

References H, Acts::detail::covariance_helper< CovMatrix_t, NumIter >::isSemiPositive(), and S().

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

• acts/blob/sPHENIX/Core/include/Acts/EventData/detail/covariance_helper.hpp