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Chi2MeasurementEstimator Class Reference

A Chi2 Measurement Estimator. More...

#include <TrackingTools/KalmanUpdators/interface/Chi2MeasurementEstimator.h>

Inheritance diagram for Chi2MeasurementEstimator:

Chi2MeasurementEstimatorBase MeasurementEstimator

List of all members.

Public Member Functions

 Chi2MeasurementEstimator (double maxChi2, double nSigma=3.)
 Construct with cuts on chi2 and nSigma.
virtual Chi2MeasurementEstimatorclone () const
template<unsigned int D>
std::pair< bool, double > estimate (const TrajectoryStateOnSurface &, const TransientTrackingRecHit &) const
 Returns pair( true, value) if the TrajectoryStateOnSurface is compatible with the RecHit, and pair( false, value) if it is not compatible.
virtual std::pair< bool, double > estimate (const TrajectoryStateOnSurface &, const TransientTrackingRecHit &) const
 Returns pair( true, value) if the TrajectoryStateOnSurface is compatible with the RecHit, and pair( false, value) if it is not compatible.


Detailed Description

A Chi2 Measurement Estimator.

Computhes the Chi^2 of a TrajectoryState with a RecHit or a BoundPlane. The TrajectoryState must have errors. Works for any RecHit dimension. Ported from ORCA.

Date
2007/05/09 14:05:13
Revision
1.3
Author:
todorov, cerati

Definition at line 17 of file Chi2MeasurementEstimator.h.


Constructor & Destructor Documentation

Chi2MeasurementEstimator::Chi2MeasurementEstimator ( double  maxChi2,
double  nSigma = 3. 
) [inline, explicit]

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 BoundPlane and maximalLocalDisplacement.

Definition at line 25 of file Chi2MeasurementEstimator.h.

Referenced by clone().

00025                                                                         : 
00026     Chi2MeasurementEstimatorBase( maxChi2, nSigma) {}


Member Function Documentation

virtual Chi2MeasurementEstimator* Chi2MeasurementEstimator::clone ( void   )  const [inline, virtual]

Implements MeasurementEstimator.

Definition at line 33 of file Chi2MeasurementEstimator.h.

References Chi2MeasurementEstimator().

00033                                                   {
00034     return new Chi2MeasurementEstimator(*this);
00035   }

template<unsigned int D>
std::pair<bool,double> Chi2MeasurementEstimator::estimate ( const TrajectoryStateOnSurface ts,
const TransientTrackingRecHit hit 
) const [inline, 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.

std::pair< bool, double > Chi2MeasurementEstimator::estimate ( const TrajectoryStateOnSurface ts,
const TransientTrackingRecHit hit 
) const [inline, 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.

Definition at line 7 of file Chi2MeasurementEstimator.cc.

References TrackingRecHit::dimension(), and Exception.

Referenced by MuonChi2MeasurementEstimator::estimate(), Chi2Switching1DEstimator::estimate(), GsfChi2MeasurementEstimator::estimate(), Chi2SwitchingEstimator::estimate(), CosmicMuonSmoother::fit(), MuonRoadTrajectoryBuilder::GatherHits(), SimpleTrackRefitter::refitTrack(), and CosmicMuonSmoother::smooth().

00008                                                                                  {
00009     switch (aRecHit.dimension()) {
00010         case 1: return estimate<1>(tsos,aRecHit);
00011         case 2: return estimate<2>(tsos,aRecHit);
00012         case 3: return estimate<3>(tsos,aRecHit);
00013         case 4: return estimate<4>(tsos,aRecHit);
00014         case 5: return estimate<5>(tsos,aRecHit);
00015     }
00016     throw cms::Exception("RecHit of invalid size (not 1,2,3,4,5)");
00017 }


The documentation for this class was generated from the following files:
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