Simple Kalman filter implementation. More...

#include <fun4all_GenFit/blob/master/fitters/include/KalmanFitter.h>

Inheritance diagram for genfit::KalmanFitter:

Collaboration diagram for genfit::KalmanFitter:

Public Member Functions
	KalmanFitter (unsigned int maxIterations=4, double deltaPval=1e-3, double blowUpFactor=1e3, bool squareRootFormalism=false)

	~KalmanFitter ()

void	processTrackWithRep (Track tr, const AbsTrackRep rep, bool resortHits=false) override
	Hit resorting currently NOT supported.

void	processTrackPartially (Track tr, const AbsTrackRep rep, int startId=0, int endId=-1)

void	useSquareRootFormalism (bool squareRootFormalism=true)

Public Member Functions inherited from genfit::AbsKalmanFitter
	AbsKalmanFitter (unsigned int maxIterations=4, double deltaPval=1e-3, double blowUpFactor=1e3)

virtual	~AbsKalmanFitter ()

void	getChiSquNdf (const Track tr, const AbsTrackRep rep, double &bChi2, double &fChi2, double &bNdf, double &fNdf) const

double	getChiSqu (const Track tr, const AbsTrackRep rep, int direction=-1) const

double	getNdf (const Track tr, const AbsTrackRep rep, int direction=-1) const

double	getRedChiSqu (const Track tr, const AbsTrackRep rep, int direction=-1) const

double	getPVal (const Track tr, const AbsTrackRep rep, int direction=-1) const

unsigned int	getMinIterations () const

unsigned int	getMaxIterations () const

double	getDeltaPval () const

double	getRelChi2Change () const

double	getBlowUpFactor () const

bool	getResetOffDiagonals () const

double	getBlowUpMaxVal () const

eMultipleMeasurementHandling	getMultipleMeasurementHandling () const

int	getMaxFailedHits () const

virtual void	setMinIterations (unsigned int n)
	Set the minimum number of iterations.

virtual void	setMaxIterations (unsigned int n)
	Set the maximum number of iterations.

void	setDeltaPval (double deltaPval)
	Set Convergence criterion.

void	setRelChi2Change (double relChi2Change)

void	setBlowUpFactor (double blowUpFactor)

void	setResetOffDiagonals (bool resetOffDiagonals)

void	setBlowUpMaxVal (double blowUpMaxVal)
	Limit the cov entries to this maximum value when blowing up the cov. Set to negative value to disable. Default is 1.E6.

void	setMultipleMeasurementHandling (eMultipleMeasurementHandling mmh)
	How should multiple measurements be handled?

virtual void	setMaxFailedHits (int val)

bool	isTrackPrepared (const Track tr, const AbsTrackRep rep) const

bool	isTrackFitted (const Track tr, const AbsTrackRep rep) const

bool	canIgnoreWeights () const
	returns if the fitter can ignore the weights and handle the MeasurementOnPlanes as if they had weight 1.

Public Member Functions inherited from genfit::AbsFitter
	AbsFitter ()

virtual	~AbsFitter ()

void	processTrack (Track *, bool resortHits=false)

virtual void	setDebugLvl (unsigned int lvl=1)

Private Member Functions
	KalmanFitter (const KalmanFitter &)

KalmanFitter &	operator= (KalmanFitter const &)

bool	fitTrack (Track tr, const AbsTrackRep rep, double &chi2, double &ndf, int startId, int endId, int &nFailedHits)

void	processTrackPoint (TrackPoint tp, const AbsTrackRep rep, double &chi2, double &ndf, int direction)

Private Attributes
std::unique_ptr < MeasuredStateOnPlane >	currentState_

bool	squareRootFormalism_

Additional Inherited Members
Protected Member Functions inherited from genfit::AbsKalmanFitter
const std::vector < MeasurementOnPlane * >	getMeasurements (const KalmanFitterInfo fi, const TrackPoint tp, int direction) const
	get the measurementsOnPlane taking the multipleMeasurementHandling_ into account

Protected Attributes inherited from genfit::AbsKalmanFitter
unsigned int	minIterations_
	Minimum number of iterations to attempt. Forward and backward are counted as one iteration.

unsigned int	maxIterations_
	Maximum number of iterations to attempt. Forward and backward are counted as one iteration.

double	deltaPval_
	Convergence criterion.

double	relChi2Change_

double	blowUpFactor_
	Blow up the covariance of the forward (backward) fit by this factor before seeding the backward (forward) fit.

bool	resetOffDiagonals_
	Reset the off-diagonals to 0 when blowing up the cov.

double	blowUpMaxVal_
	Limit the cov entries to this maxuimum value when blowing up the cov.

eMultipleMeasurementHandling	multipleMeasurementHandling_
	How to handle if there are multiple MeasurementsOnPlane.

int	maxFailedHits_

Detailed Description

Simple Kalman filter implementation.

Definition at line 40 of file KalmanFitter.h.

View newest version in sPHENIX GitHub at line 40 of file KalmanFitter.h

Constructor & Destructor Documentation

genfit::KalmanFitter::KalmanFitter ( const KalmanFitter & )

private

genfit::KalmanFitter::KalmanFitter	(	unsigned int	maxIterations = `4`,
		double	deltaPval = `1e-3`,
		double	blowUpFactor = `1e3`,
		bool	squareRootFormalism = `false`
	)

inline

Definition at line 50 of file KalmanFitter.h.

View newest version in sPHENIX GitHub at line 50 of file KalmanFitter.h

genfit::KalmanFitter::~KalmanFitter ( )

inline

Definition at line 55 of file KalmanFitter.h.

View newest version in sPHENIX GitHub at line 55 of file KalmanFitter.h

Member Function Documentation

bool KalmanFitter::fitTrack	(	Track *	tr,
		const AbsTrackRep *	rep,
		double &	chi2,
		double &	ndf,
		int	startId,
		int	endId,
		int &	nFailedHits
	)

private

Definition at line 43 of file KalmanFitter.cc.

View newest version in sPHENIX GitHub at line 43 of file KalmanFitter.cc

References genfit::AbsFitter::debugLvl_, genfit::debugOut, genfit::TrackPoint::deleteFitterInfo(), Acts::UnitConstants::e, genfit::errorOut, genfit::AbsTrackRep::getDim(), genfit::Track::getNumPointsWithMeasurement(), genfit::Track::getPoint(), genfit::Track::getPointWithMeasurement(), genfit::AbsKalmanFitter::maxFailedHits_, genfit::AbsKalmanFitter::multipleMeasurementHandling_, processTrackPoint(), genfit::Exception::setFatal(), genfit::unweightedClosestToReference, genfit::unweightedClosestToReferenceWire, genfit::weightedClosestToReference, genfit::weightedClosestToReferenceWire, and genfit::Exception::what().

Referenced by processTrackPartially(), and processTrackWithRep().

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KalmanFitter& genfit::KalmanFitter::operator= ( KalmanFitter const & )

private

void KalmanFitter::processTrackPartially	(	Track *	tr,
		const AbsTrackRep *	rep,
		int	startId = `0`,
		int	endId = `-1`
	)

process only a part of the track. Can also be used to process the track only in backward direction. Does not alter the FitStatus and does not do multiple iterations.

Definition at line 304 of file KalmanFitter.cc.

View newest version in sPHENIX GitHub at line 304 of file KalmanFitter.cc

References genfit::AbsKalmanFitter::blowUpFactor_, genfit::AbsKalmanFitter::blowUpMaxVal_, Acts::Test::cov, currentState_, genfit::AbsFitter::debugLvl_, genfit::debugOut, fitTrack(), genfit::Track::getCardinalRep(), genfit::Track::getCovSeed(), genfit::Track::getFitStatus(), genfit::KalmanFitterInfo::getFittedState(), genfit::TrackPoint::getFitterInfo(), genfit::Track::getNumPointsWithMeasurement(), genfit::Track::getPointWithMeasurement(), genfit::AbsTrackRep::getPosMomCov(), genfit::AbsTrackRep::getQop(), genfit::Track::getStateSeed(), genfit::Track::getTimeSeed(), genfit::TrackPoint::hasFitterInfo(), genfit::KalmanFitterInfo::hasPredictionsAndUpdates(), genfit::FitStatus::isTrackPruned(), charm_jet_coverage::mom, pos(), genfit::AbsKalmanFitter::resetOffDiagonals_, genfit::AbsTrackRep::setPosMomCov(), genfit::AbsTrackRep::setQop(), and genfit::AbsTrackRep::setTime().