LocalTrajectoryError Class Reference

#include <LocalTrajectoryError.h>

Public Member Functions
bool	invalid () const
	LocalTrajectoryError ()
	LocalTrajectoryError (const AlgebraicSymMatrix55 &aCovarianceMatrix)
	LocalTrajectoryError (float dx, float dy, float dxdir, float dydir, float dpinv)
	LocalTrajectoryError (InvalidError)
const AlgebraicSymMatrix55 &	matrix () const
LocalTrajectoryError &	operator*= (double factor)
bool	posDef () const
LocalError	positionError () const
bool	valid () const
const AlgebraicSymMatrix55 &	weightMatrix () const
	~LocalTrajectoryError ()

Private Attributes
AlgebraicSymMatrix55	theCovarianceMatrix
std::shared_ptr< AlgebraicSymMatrix55 >	theWeightMatrixPtr

Detailed Description

Class providing access to the covariance matrix of a set of relevant parameters of a trajectory in a local, Cartesian frame. The errors provided are:

sigma^2(q/p) : charge (plus or minus one) divided by magnitude of momentum
sigma^2(dxdz) : direction tangent in local xz-plane
sigma^2(dydz) : direction tangent in local yz-plane
sigma^2(x) : local x-coordinate
sigma^2(y) : local y-coordinate

plus the relevant correlation terms.

Definition at line 20 of file LocalTrajectoryError.h.

Constructor & Destructor Documentation

LocalTrajectoryError() [1/4]

LocalTrajectoryError::LocalTrajectoryError ( )

inline

Definition at line 23 of file LocalTrajectoryError.h.

{}

LocalTrajectoryError() [2/4]

LocalTrajectoryError::LocalTrajectoryError ( InvalidError  )

inline

Definition at line 25 of file LocalTrajectoryError.h.

                                     : theCovarianceMatrix(ROOT::Math::SMatrixNoInit()) {
    theCovarianceMatrix(0, 0) = -99999.e10;
  }

References theCovarianceMatrix.

~LocalTrajectoryError()

LocalTrajectoryError::~LocalTrajectoryError ( )

inline

Definition at line 29 of file LocalTrajectoryError.h.

{}

LocalTrajectoryError() [3/4]

LocalTrajectoryError::LocalTrajectoryError ( const AlgebraicSymMatrix55 &  aCovarianceMatrix )

inline

Constructing class from a full covariance matrix. The sequence of the parameters is the same as the one described above.

Definition at line 44 of file LocalTrajectoryError.h.

      : theCovarianceMatrix(aCovarianceMatrix), theWeightMatrixPtr() {}

LocalTrajectoryError() [4/4]

LocalTrajectoryError::LocalTrajectoryError	(	float	dx,
		float	dy,
		float	dxdir,
		float	dydir,
		float	dpinv
	)

Constructing class from standard deviations of the individual parameters, making the covariance matrix diagonal. The sequence of the input parameters is sigma(x), sigma(y), sigma(dxdz), sigma(dydz), sigma(q/p), but the resulting covariance matrix has the same structure as the one described above.

Definition at line 5 of file LocalTrajectoryError.cc.

    : theCovarianceMatrix(), theWeightMatrixPtr() {
  theCovarianceMatrix(3, 3) = dx * dx;
  theCovarianceMatrix(4, 4) = dy * dy;
  theCovarianceMatrix(1, 1) = dxdir * dxdir;
  theCovarianceMatrix(2, 2) = dydir * dydir;
  theCovarianceMatrix(0, 0) = dpinv * dpinv;
}

References PVValHelper::dx, PVValHelper::dy, and theCovarianceMatrix.

Member Function Documentation

invalid()

bool LocalTrajectoryError::invalid ( ) const

inline

Definition at line 31 of file LocalTrajectoryError.h.

{ return theCovarianceMatrix(0, 0) < -1.e10; }

References theCovarianceMatrix.

Referenced by BasicTrajectoryState::localError(), and valid().

matrix()

const AlgebraicSymMatrix55& LocalTrajectoryError::matrix ( void  ) const

inline

Returns the covariance matrix.

Definition at line 60 of file LocalTrajectoryError.h.

{ return theCovarianceMatrix; }

References theCovarianceMatrix.

Referenced by MuonResidualsFromTrack::addTrkCovMatrix(), OverlapValidation::analyze(), GlobalTrackerMuonAlignment::analyzeTrackTrack(), GlobalTrackerMuonAlignment::analyzeTrackTrajectory(), SiTrackerMultiRecHitUpdator::calcParameters(), BasicTrajectoryState::checkCurvilinError(), CollinearFitAtTM2::CollinearFitAtTM2(), TrajectoryStateCombiner::combine(), MultipleScatteringUpdator::compute(), GsfTrackProducerBase::computeModeAtTM(), PFGsfHelper::computeQpMode(), SiTrackerMultiRecHitUpdator::ComputeWeight(), ReferenceTrajectory::construct(), GlobalTrackerMuonAlignment::debugTrajectorySOS(), GlobalTrackerMuonAlignment::debugTrajectorySOSv(), MRHChi2MeasurementEstimator::estimate(), CollinearFitAtTM::fit(), GsfTrackProducerBase::localParametersFromQpMode(), GlobalMuonTrackMatcher::match_Chi2(), TSGForOI::match_Chi2(), TSGForOIFromL2::match_Chi2(), SeedMatcher::matchSimTrack(), MeasurementExtractor::measuredError(), BasicTrajectoryState::missingError(), GlobalTrackerMuonAlignment::muonFitter(), oldMUcompute(), operator<<(), TRecHit5DParamConstraint::parametersError(), trajectoryStateTransform::persistentState(), TrackAssociatorByPositionImpl::quality(), BasicTrajectoryState::rescaleError(), TrajectorySegmentBuilder::segments(), CRackTrajectoryBuilder::SortHits(), FastTSGFromPropagation::stateOnDet(), ChargeSignificanceTrajectoryFilter::TBC(), GlobalTrackerMuonAlignment::trackFitter(), DualTrajectoryFactory::trajectories(), DualBzeroTrajectoryFactory::trajectories(), Strip1DMeasurementTransformator::trajectoryError(), Tsos2DPhi::Tsos2DPhi(), Tsos2DZed::Tsos2DZed(), Tsos4D::Tsos4D(), GsfMaterialEffectsUpdator::updateState(), and MaterialEffectsUpdator::updateStateInPlace().

operator*=()

LocalTrajectoryError& LocalTrajectoryError::operator*= ( double  factor )

inline

Enables the multiplication of the covariance matrix with the scalar "factor".

Definition at line 69 of file LocalTrajectoryError.h.

                                                  {
    theCovarianceMatrix *= factor;
    if ((theWeightMatrixPtr.get() != nullptr) && (factor != 0.0)) {
      (*theWeightMatrixPtr) /= factor;
    }
    return *this;
  }

References DQMScaleToClient_cfi::factor, theCovarianceMatrix, and theWeightMatrixPtr.

posDef()

bool LocalTrajectoryError::posDef ( ) const

inline

Definition at line 35 of file LocalTrajectoryError.h.

                      {
    return (theCovarianceMatrix(0, 0) >= 0) && (theCovarianceMatrix(1, 1) >= 0) && (theCovarianceMatrix(2, 2) >= 0) &&
           (theCovarianceMatrix(3, 3) >= 0) && (theCovarianceMatrix(4, 4) >= 0);
  }

References theCovarianceMatrix.

Referenced by KFTrajectoryFitter::fitOne().

positionError()

LocalError LocalTrajectoryError::positionError ( ) const

inline

Returns the two-by-two submatrix of the covariance matrix which yields the local position errors as well as the correlation between them.

Definition at line 81 of file LocalTrajectoryError.h.

                                   {
    return LocalError(theCovarianceMatrix(3, 3), theCovarianceMatrix(3, 4), theCovarianceMatrix(4, 4));
  }

References theCovarianceMatrix.

Referenced by CkfDebugger::analyseCompatibleMeasurements(), GEMEfficiencyAnalyzer::analyze(), TkGluedMeasurementDet::checkHitProjection(), MTDSectorForwardDoubleLayer::compatible(), ForwardDetLayer::compatible(), MuRingForwardDoubleLayer::compatible(), MTDRingForwardDoubleLayer::compatible(), MTDSectorForwardLayer::compatibleDets(), MuRingForwardLayer::compatibleDets(), MTDRingForwardLayer::compatibleDets(), CaloDetIdAssociator::crossedElement(), OutsideInMuonSeeder::doLayer(), Chi2MeasurementEstimatorBase::estimate(), AlignmentMonitorGeneric::event(), AlignmentMonitorMuonResiduals::event(), TrackerValidationVariables::fillHitQuantities(), ApeEstimator::fillHitVariables(), TrackDetectorAssociator::getTAMuonChamberMatches(), TkPixelMeasurementDet::hasBadComponents(), ShallowGainCalibration::isFarFromBorder(), SiStripGainFromData::IsFarFromBorder(), DeDxTools::IsFarFromBorder(), TRecHit5DParamConstraint::localPositionError(), GlobalMuonTrackMatcher::match_dist(), Chi2MeasurementEstimatorBase::maximalLocalDisplacement(), TkPixelMeasurementDet::measurements(), TkStripMeasurementDet::measurements(), MuonResidualsFromTrack::MuonResidualsFromTrack(), HIPAlignmentAlgorithm::processHit1D(), HIPAlignmentAlgorithm::processHit2D(), ShallowTrackClustersProducer::produce(), AlignmentMuonHIPTrajectorySelector::produce(), TkPhase2OTMeasurementDet::recHits(), TkGluedMeasurementDet::testStrips(), TrackEfficiencyMonitor::testTrackerTracks(), trajectoryToResiduals(), SimpleNavigableLayer::wellInside(), MTDTrayBarrelLayer::xError(), and MuRodBarrelLayer::xError().

valid()

bool LocalTrajectoryError::valid ( ) const

inline

Definition at line 32 of file LocalTrajectoryError.h.

{ return !invalid(); }

References invalid().

Referenced by BasicTrajectoryState::hasError(), BasicTrajectoryState::missingError(), and BasicTrajectoryState::rescaleError().

weightMatrix()

const AlgebraicSymMatrix55 & LocalTrajectoryError::weightMatrix

(

void

)

const

Returns the inverse of covariance matrix.

Definition at line 14 of file LocalTrajectoryError.cc.

                                                                     {
  if
    UNLIKELY(theWeightMatrixPtr.get() == nullptr) {
      theWeightMatrixPtr.reset(new AlgebraicSymMatrix55());
      invertPosDefMatrix(theCovarianceMatrix, *theWeightMatrixPtr);
    }
  return *theWeightMatrixPtr;
}

References invertPosDefMatrix(), theCovarianceMatrix, theWeightMatrixPtr, and UNLIKELY.

Member Data Documentation

theCovarianceMatrix

AlgebraicSymMatrix55 LocalTrajectoryError::theCovarianceMatrix

private

Definition at line 86 of file LocalTrajectoryError.h.

Referenced by invalid(), LocalTrajectoryError(), matrix(), operator*=(), posDef(), positionError(), and weightMatrix().

theWeightMatrixPtr

std::shared_ptr<AlgebraicSymMatrix55> LocalTrajectoryError::theWeightMatrixPtr

mutableprivate

Definition at line 87 of file LocalTrajectoryError.h.

Referenced by operator*=(), and weightMatrix().