Chi2MeasurementEstimator Class Reference

#include <Chi2MeasurementEstimator.h>

Inheritance diagram for Chi2MeasurementEstimator:

Public Member Functions
	Chi2MeasurementEstimator (double maxChi2, double nSigma=3.)
virtual Chi2MeasurementEstimator *	clone () const
virtual std::pair< bool, double >	estimate (const TrajectoryStateOnSurface &, const TrackingRecHit &) const
Public Member Functions inherited from Chi2MeasurementEstimatorBase
	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma=3.)
double	chiSquaredCut () const
virtual bool	estimate (const TrajectoryStateOnSurface &ts, const Plane &plane) const
virtual Local2DVector	maximalLocalDisplacement (const TrajectoryStateOnSurface &ts, const Plane &plane) const
double	nSigmaCut () const
Public Member Functions inherited from MeasurementEstimator
virtual	~MeasurementEstimator ()

Additional Inherited Members
Public Types inherited from MeasurementEstimator
typedef std::pair< bool, double >	HitReturnType
typedef Vector2DBase< float, LocalTag >	Local2DVector
typedef bool	SurfaceReturnType
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.

Constructor & Destructor Documentation

Chi2MeasurementEstimator::Chi2MeasurementEstimator ( double  maxChi2, double  nSigma = 3.  )

inlineexplicit

Construct with cuts on chi2 and nSigma. The cut on Chi2 is used to define the acceptance of RecHits. The errors of the trajectory state are multiplied by nSigma to define acceptance of Plane and maximalLocalDisplacement.

Definition at line 23 of file Chi2MeasurementEstimator.h.

Referenced by clone().

                                                                        : 
    Chi2MeasurementEstimatorBase( maxChi2, nSigma) {}

Member Function Documentation

virtual Chi2MeasurementEstimator* Chi2MeasurementEstimator::clone ( void  ) const

inlinevirtual

Implements MeasurementEstimator.

Reimplemented in Chi2ChargeMeasurementEstimator.

Definition at line 29 of file Chi2MeasurementEstimator.h.

References Chi2MeasurementEstimator().

                                                  {
    return new Chi2MeasurementEstimator(*this);
  }

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

virtual

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.

Reimplemented in Chi2ChargeMeasurementEstimator.

Definition at line 35 of file Chi2MeasurementEstimator.cc.

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

Referenced by CosmicTrajectoryBuilder::AddHit(), CRackTrajectoryBuilder::AddHit(), GsfChi2MeasurementEstimator::estimate(), MuonChi2MeasurementEstimator::estimate(), Chi2ChargeMeasurementEstimator::estimate(), CosmicMuonSmoother::fit(), and CosmicMuonSmoother::smooth().

                                                                        {
    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)");
}