pixeltemp::Cluster1DMerger< T > Class Template Reference

#include <Cluster1DMerger.h>

Public Member Functions
	Cluster1DMerger (const Cluster1DMerger &)
	Cluster1DMerger (const WeightEstimator< T > &, const math::XYZPoint &bs=math::XYZPoint(0., 0., 0.))
Cluster1D< T >	operator() (const Cluster1D< T > &first, const Cluster1D< T > &second) const
void	setBeamSpot (const math::XYZPoint &bs)
	~Cluster1DMerger ()

Private Attributes
math::XYZPoint	theBS
WeightEstimator< T > *	theEstimator

Detailed Description

template<class T>
class pixeltemp::Cluster1DMerger< T >

Definition at line 17 of file Cluster1DMerger.h.

Constructor & Destructor Documentation

Cluster1DMerger() [1/2]

template<class T>

Cluster1DMerger< T >::Cluster1DMerger	(	const WeightEstimator< T > &	est,
		const math::XYZPoint &	bs = math::XYZPoint(0., 0., 0.)
	)

Definition at line 35 of file Cluster1DMerger.h.

      : theEstimator(est.clone()), theBS(bs) {}

~Cluster1DMerger()

template<class T >

Cluster1DMerger< T >::~Cluster1DMerger

(

)

Definition at line 39 of file Cluster1DMerger.h.

                                       {
    delete theEstimator;
  }

Cluster1DMerger() [2/2]

template<class T>

Cluster1DMerger< T >::Cluster1DMerger

(

const Cluster1DMerger< T > &

other

)

Definition at line 44 of file Cluster1DMerger.h.

      : theEstimator(other.theEstimator->clone()), theBS(other.theBS) {}

Member Function Documentation

operator()()

template<class T>

Cluster1D< T > Cluster1DMerger< T >::operator()	(	const Cluster1D< T > &	first,
		const Cluster1D< T > &	second
	)		const

Definition at line 48 of file Cluster1DMerger.h.

                                                                                                         {
    std::vector<const T *> tracks = first.tracks();
    std::vector<const T *> sectracks = second.tracks();
    for (typename std::vector<const T *>::const_iterator i = sectracks.begin(); i != sectracks.end(); ++i) {
      tracks.push_back(*i);
    };
    float newpos =
        (first.position().value() * first.weight() / first.position().error() / first.position().error() +
         second.position().value() * second.weight() / second.position().error() / second.position().error()) /
        (first.weight() / first.position().error() / first.position().error() +
         second.weight() / second.position().error() / second.position().error());
 
    float newerr = sqrt(first.position().error() * first.position().error() +
                        second.position().error() * second.position().error());
    float newWeight = theEstimator->weight(tracks);
 
    // Now try a different method
    float sumUp = 0;
    float sumDown = 0;
    float err = 0;
    for (unsigned int i = 0; i < tracks.size(); ++i) {
      //      float err2 = tracks[i]->covariance( reco::TrackBase::i_dz, reco::TrackBase::i_dz );
      float err2 = tracks[i]->dzError();
      err2 *= err2;
 
      if (err2 != 0) {
        sumUp += tracks[i]->dz(theBS) * 1 / err2;  // error-weighted average of Z at IP
        sumDown += 1 / err2;
      }
      err += sqrt(err2);
    }
 
    newpos = sumUp / sumDown;
    newerr = err / tracks.size() / sqrt(1.0 * tracks.size());
 
    Measurement1D newmeas(newpos, newerr);
    return Cluster1D<T>(newmeas, tracks, newWeight);
  }

setBeamSpot()

template<class T>

void pixeltemp::Cluster1DMerger< T >::setBeamSpot ( const math::XYZPoint &  bs )

inline

Definition at line 20 of file Cluster1DMerger.h.

{ theBS = bs; }

Member Data Documentation

theBS

template<class T>

math::XYZPoint pixeltemp::Cluster1DMerger< T >::theBS

private

Definition at line 27 of file Cluster1DMerger.h.

Referenced by pixeltemp::Cluster1DMerger< reco::Track >::setBeamSpot().

theEstimator

template<class T>

WeightEstimator<T>* pixeltemp::Cluster1DMerger< T >::theEstimator

private

Definition at line 26 of file Cluster1DMerger.h.