Chi2MeasurementEstimator Class Reference

#include <Chi2MeasurementEstimator.h>

Inheritance diagram for Chi2MeasurementEstimator:

Public Member Functions
Chi2MeasurementEstimator *	clone () const override
std::pair< bool, double >	estimate (const TrajectoryStateOnSurface &, const TrackingRecHit &) const override
Public Member Functions inherited from Chi2MeasurementEstimatorBase
	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma=3., float maxDisp=std::numeric_limits< float >::max())
template<typename... Args>
	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma, float maxDisp, Args &&...args)
double	chiSquaredCut () const
bool	estimate (const TrajectoryStateOnSurface &ts, const Plane &plane) const final
Local2DVector	maximalLocalDisplacement (const TrajectoryStateOnSurface &ts, const Plane &plane) const final
double	nSigmaCut () const
Public Member Functions inherited from MeasurementEstimator
float	maxSagitta () const
	MeasurementEstimator ()
	MeasurementEstimator (float maxSag, float minToll, float mpt)
float	minPt2ForHitRecoveryInGluedDet () const
float	minTolerance2 () const
virtual bool	preFilter (const TrajectoryStateOnSurface &, OpaquePayload const &) const
virtual	~MeasurementEstimator ()

Additional Inherited Members
Public Types inherited from MeasurementEstimator
using	HitReturnType = std::pair< bool, double >
using	Local2DVector = Vector2DBase< float, LocalTag >
using	SurfaceReturnType = bool
Protected Member Functions inherited from Chi2MeasurementEstimatorBase
std::pair< bool, double >	returnIt (double est) const

Detailed Description

A Chi2 Measurement Estimator. Computhes the Chi^2 of a TrajectoryState with a RecHit or a Plane. The TrajectoryState must have errors. Works for any RecHit dimension. Ported from ORCA.

Author

todorov, cerati

Definition at line 15 of file Chi2MeasurementEstimator.h.

Member Function Documentation

Chi2MeasurementEstimator* Chi2MeasurementEstimator::clone ( void  ) const

inlineoverridevirtual

Implements MeasurementEstimator.

Definition at line 21 of file Chi2MeasurementEstimator.h.

References Chi2MeasurementEstimator_cfi::Chi2MeasurementEstimator.

{ return new Chi2MeasurementEstimator(*this); }

std::pair< bool, double > Chi2MeasurementEstimator::estimate ( const TrajectoryStateOnSurface &  ts, const TrackingRecHit &  hit  ) const

overridevirtual

Returns pair( true, value) if the TrajectoryStateOnSurface is compatible with the RecHit, and pair( false, value) if it is not compatible. The TrajectoryStateOnSurface must be on the same Surface as the RecHit. For an estimator where there is no value computed, e.g. fixed window estimator, only the first(bool) part is of interest.

Implements Chi2MeasurementEstimatorBase.

Definition at line 32 of file Chi2MeasurementEstimator.cc.

References TrackingRecHit::dimension(), Exception, and Chi2MeasurementEstimatorBase::returnIt().

Referenced by GsfChi2MeasurementEstimator::estimate(), and MuonChi2MeasurementEstimator::estimate().

                                                                                                {
  switch (aRecHit.dimension()) {
    case 1:
      return returnIt(lestimate<1>(tsos, aRecHit));
    case 2:
      return returnIt(lestimate<2>(tsos, aRecHit));
    case 3:
      return returnIt(lestimate<3>(tsos, aRecHit));
    case 4:
      return returnIt(lestimate<4>(tsos, aRecHit));
    case 5:
      return returnIt(lestimate<5>(tsos, aRecHit));
  }
  throw cms::Exception("RecHit of invalid size (not 1,2,3,4,5)");
}