EcalUncalibRecHitTimeWeightsAlgo< C > Class Template Reference

#include <EcalUncalibRecHitTimeWeightsAlgo.h>

Public Member Functions
	EcalUncalibRecHitTimeWeightsAlgo ()
double	time (const C &dataFrame, const std::vector< double > &amplitudes, const EcalPedestals::Item *aped, const EcalMGPAGainRatio *aGain, const FullSampleVector &fullpulse, const EcalWeightSet::EcalWeightMatrix **weights)
	Compute time. More...
virtual	~EcalUncalibRecHitTimeWeightsAlgo ()

Detailed Description

template<class C>
class EcalUncalibRecHitTimeWeightsAlgo< C >

Template used to compute amplitude, pedestal, time jitter, chi2 of a pulse using a weights method

Author

J. Bendavid, E. Di Marco

The chi2 computation with matrix is replaced by the chi2express which is moved outside the weight algo (need to clean up the interface in next iteration so that we do not pass-by useless arrays)

Definition at line 27 of file EcalUncalibRecHitTimeWeightsAlgo.h.

Constructor & Destructor Documentation

template<class C>

EcalUncalibRecHitTimeWeightsAlgo< C >::EcalUncalibRecHitTimeWeightsAlgo ( )

inline

Definition at line 29 of file EcalUncalibRecHitTimeWeightsAlgo.h.

{};

template<class C>

virtual EcalUncalibRecHitTimeWeightsAlgo< C >::~EcalUncalibRecHitTimeWeightsAlgo ( )

inlinevirtual

Definition at line 30 of file EcalUncalibRecHitTimeWeightsAlgo.h.

{};

Member Function Documentation

template<class C>

double EcalUncalibRecHitTimeWeightsAlgo< C >::time ( const C &  dataFrame, const std::vector< double > &  amplitudes, const EcalPedestals::Item *  aped, const EcalMGPAGainRatio *  aGain, const FullSampleVector &  fullpulse, const EcalWeightSet::EcalWeightMatrix **  weights  )

inline

Compute time.

Definition at line 33 of file EcalUncalibRecHitTimeWeightsAlgo.h.

Referenced by EcalUncalibRecHitWorkerMultiFit::run().

                                                             {
    const unsigned int nsample = EcalDataFrame::MAXSAMPLES;

    double maxamplitude = -std::numeric_limits<double>::max();

    double pulsenorm = 0.;
    int iGainSwitch = 0;

    ROOT::Math::SVector<double, nsample> pedSubSamples;
    for (unsigned int iSample = 0; iSample < nsample; iSample++) {
      const EcalMGPASample &sample = dataFrame.sample(iSample);

      double amplitude = 0.;
      int gainId = sample.gainId();

      double pedestal = 0.;
      double gainratio = 1.;

      if (gainId == 0 || gainId == 3) {
        pedestal = aped->mean_x1;
        gainratio = aGain->gain6Over1() * aGain->gain12Over6();
        iGainSwitch = 1;
      } else if (gainId == 1) {
        pedestal = aped->mean_x12;
        gainratio = 1.;
        iGainSwitch = 0;
      } else if (gainId == 2) {
        pedestal = aped->mean_x6;
        gainratio = aGain->gain12Over6();
        iGainSwitch = 1;
      }

      amplitude = ((double)(sample.adc()) - pedestal) * gainratio;

      if (gainId == 0) {
        //saturation
        amplitude = (4095. - pedestal) * gainratio;
      }

      pedSubSamples(iSample) = amplitude;

      if (amplitude > maxamplitude) {
        maxamplitude = amplitude;
      }
      pulsenorm += fullpulse(iSample);
    }

    std::vector<double>::const_iterator amplit;
    for (amplit = amplitudes.begin(); amplit < amplitudes.end(); ++amplit) {
      int ipulse = std::distance(amplitudes.begin(), amplit);
      int bx = ipulse - 5;
      int firstsamplet = std::max(0, bx + 3);
      int offset = 7 - 3 - bx;

      TVectorD pulse;
      pulse.ResizeTo(nsample);
      for (unsigned int isample = firstsamplet; isample < nsample; ++isample) {
        pulse(isample) = fullpulse(isample + offset);
        pedSubSamples(isample) = std::max(0., pedSubSamples(isample) - amplitudes[ipulse] * pulse(isample) / pulsenorm);
      }
    }

    // Compute parameters
    double amplitude_(-1.), jitter_(-1.);
    ROOT::Math::SVector<double, 3> param = (*(weights[iGainSwitch])) * pedSubSamples;
    amplitude_ = param(EcalUncalibRecHitRecAbsAlgo<C>::iAmplitude);
    if (amplitude_)
      jitter_ = -param(EcalUncalibRecHitRecAbsAlgo<C>::iTime) / amplitude_;
    else
      jitter_ = 0.;

    return jitter_;
  }