MeasurementExtractor Class Reference

#include <MeasurementExtractor.h>

Public Member Functions
AlgebraicSymMatrix	measuredError (const TransientTrackingRecHit &)
template<unsigned int D>
AlgebraicROOTObject< D >::SymMatrix	measuredError (const TransientTrackingRecHit &hit)
AlgebraicVector	measuredParameters (const TransientTrackingRecHit &)
template<unsigned int D>
AlgebraicROOTObject< D >::Vector	measuredParameters (const TransientTrackingRecHit &hit)
	MeasurementExtractor (const TrajectoryStateOnSurface &aTSoS)

Private Attributes
const TrajectoryStateOnSurface &	theTSoS

Detailed Description

Extracts the subset of TrajectoryState parameters and errors that correspond to the parameters measured by a RecHit.

Definition at line 12 of file MeasurementExtractor.h.

Constructor & Destructor Documentation

MeasurementExtractor::MeasurementExtractor ( const TrajectoryStateOnSurface &  aTSoS )

inline

Definition at line 15 of file MeasurementExtractor.h.

                                                              :
    theTSoS(aTSoS) {}

Member Function Documentation

AlgebraicSymMatrix MeasurementExtractor::measuredError

(

const TransientTrackingRecHit &

hit

)

Definition at line 9 of file MeasurementExtractor.cc.

References asHepMatrix(), TrajectoryStateOnSurface::localError(), LocalTrajectoryError::matrix(), TrackingRecHit::projectionMatrix(), and theTSoS.

Referenced by CkfDebugger::analyseRecHitExistance(), TestTrackHits::computeChi2Increment(), and CkfDebugger::computePulls().

                                                                                         {
  AlgebraicSymMatrix err5( asHepMatrix( theTSoS.localError().matrix() ) );
  AlgebraicMatrix H( hit.projectionMatrix());
  //  return AlgebraicSymMatrix( H * err5 * H.T());
  return err5.similarity(H);
}

template<unsigned int D>

AlgebraicROOTObject<D>::SymMatrix MeasurementExtractor::measuredError ( const TransientTrackingRecHit &  hit )

inline

Definition at line 33 of file MeasurementExtractor.h.

References TrajectoryStateOnSurface::localError(), LocalTrajectoryError::matrix(), TrackingRecHit::projectionMatrix(), and theTSoS.

                                                                                                                       {
      typedef typename AlgebraicROOTObject<D,5>::Matrix Mat;
      const AlgebraicSymMatrix55 &err5 =  theTSoS.localError().matrix();
      Mat H = asSMatrix<D,5>( hit.projectionMatrix() );
      return ROOT::Math::Similarity(H,err5); 
  }

AlgebraicVector MeasurementExtractor::measuredParameters

(

const TransientTrackingRecHit &

hit

)

Definition at line 3 of file MeasurementExtractor.cc.

References asHepVector(), TrajectoryStateOnSurface::localParameters(), TrackingRecHit::projectionMatrix(), theTSoS, and LocalTrajectoryParameters::vector().

Referenced by CkfDebugger::analyseRecHitExistance(), TestTrackHits::computeChi2Increment(), and CkfDebugger::computePulls().

                                                                                           {
  AlgebraicVector par5( asHepVector( theTSoS.localParameters().vector() ) );
  AlgebraicMatrix H( hit.projectionMatrix());
  return H*par5;
}

template<unsigned int D>

AlgebraicROOTObject<D>::Vector MeasurementExtractor::measuredParameters ( const TransientTrackingRecHit &  hit )

inline

Definition at line 26 of file MeasurementExtractor.h.

References TrajectoryStateOnSurface::localParameters(), TrackingRecHit::projectionMatrix(), theTSoS, and LocalTrajectoryParameters::vector().

                                                                                                                         {
      typedef typename AlgebraicROOTObject<D,5>::Matrix Mat;
      AlgebraicVector5 par5( theTSoS.localParameters().vector());
      Mat H = asSMatrix<D,5>( hit.projectionMatrix() );
      return H*par5;
  }

Member Data Documentation

const TrajectoryStateOnSurface& MeasurementExtractor::theTSoS

private

Definition at line 41 of file MeasurementExtractor.h.

Referenced by measuredError(), and measuredParameters().