SiStripElectronAnalyzer.cc

Go to the documentation of this file.

// -*- C++ -*-
//
// Package:     RecoEgamma/Examples
// Class  :     SiStripElectronAnalyzer
//
// Implementation:
//     <Notes on implementation>
//
// Original Author:  Jim Pivarski
//         Created:  Fri May 26 16:49:38 EDT 2006
//
 
// system include files
#include <memory>
 
// user include files
#include "RecoEgamma/Examples/plugins/SiStripElectronAnalyzer.h"
 
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
 
#include "DataFormats/Math/interface/Point3D.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "SimDataFormats/GeneratorProducts/interface/HepMCProduct.h"
#include "DataFormats/EgammaReco/interface/SuperCluster.h"
#include "DataFormats/EgammaReco/interface/BasicCluster.h"
#include "DataFormats/CaloRecHit/interface/CaloClusterFwd.h"
 
#include "RecoEcal/EgammaCoreTools/interface/PositionCalc.h"
#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/EgammaCandidates/interface/Electron.h"
#include "DataFormats/EgammaCandidates/interface/ElectronFwd.h"
#include "DataFormats/EgammaCandidates/interface/SiStripElectron.h"
#include "DataFormats/EgammaCandidates/interface/SiStripElectronFwd.h"
 
// for Si hits
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackerRecHit2D/interface/SiStripRecHit2DCollection.h"
#include "DataFormats/TrackerRecHit2D/interface/SiStripRecHit2D.h"
#include "DataFormats/TrackerRecHit2D/interface/SiStripMatchedRecHit2DCollection.h"
#include "DataFormats/TrackerRecHit2D/interface/SiStripMatchedRecHit2D.h"
#include "Geometry/CommonDetUnit/interface/GeomDet.h"
#include "Geometry/CommonDetUnit/interface/GeomDetType.h"
#include "Geometry/CommonDetUnit/interface/GeomDetEnumerators.h"
#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeometry.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "DataFormats/TrackerCommon/interface/TrackerTopology.h"
#include "Geometry/Records/interface/TrackerTopologyRcd.h"
#include "DataFormats/SiStripDetId/interface/StripSubdetector.h"
#include "DataFormats/TrackerRecHit2D/interface/SiStripRecHit2DCollection.h"
 
//
// constants, enums and typedefs
//
 
//
// static data member definitions
//
 
//
// constructors and destructor
//
SiStripElectronAnalyzer::SiStripElectronAnalyzer(const edm::ParameterSet& iConfig) {
  //now do what ever initialization is needed
  fileName_ = iConfig.getParameter<std::string>("fileName");
 
  file_ = new TFile(fileName_.c_str(), "RECREATE");
  numCand_ = new TH1F("numCandidates", "Number of candidates found", 10, -0.5, 9.5);
  numElectrons_ = new TH1F("numElectrons", "Number of Electrons found", 10, -0.5, 9.5);
  numSuperClusters_ = new TH1F("numSuperClusters", "Number of Ecal SuperClusters", 50, 0, 50);
 
  energySuperClusters_ = new TH1F("energySuperClusters", "Super Cluster Energy - all ", 200, 0, 2000.);
  energySuperClustersEl_ = new TH1F("energySuperClustersEl", "Super Cluster Energy - Electron Cands ", 200, 0., 2000.);
 
  sizeSuperClusters_ = new TH1F("sizeSuperClusters", "Super Cluster Size - all ", 20, 0, 19);
  sizeSuperClustersEl_ = new TH1F("sizeSuperClustersEl", "Super Cluster Size - Electron Cands ", 20, 0, 19);
 
  emaxSuperClusters_ = new TH1F("emaxSuperClusters", "Super Cluster Emax - all ", 200, 0, 2000.);
  emaxSuperClustersEl_ = new TH1F("emaxSuperClustersEl", "Super Cluster Emax - Electron Cands ", 200, 0, 2000.);
 
  phiWidthSuperClusters_ = new TH1F("phiWidthSuperClusters", "Super Cluster Width - all ", 20, 0., 0.05);
  phiWidthSuperClustersEl_ = new TH1F("phiWidthSuperClustersEl", "Super Cluster Width - Electron Cands ", 20, 0., 0.05);
 
  ptDiff = new TH1F("ptDiff", " ptDiff ", 20, -10., 10.);
  pDiff = new TH1F("pDiff", " pDiff ", 100, -50., 50.);
 
  pElectronFailed = new TH1F("pElectronFailed", " pElectronFailed ", 55, 0., 110.);
  ptElectronFailed = new TH1F("ptElectronFailed", " ptElectronFailed ", 55, 0., 110.);
 
  pElectronPassed = new TH1F("pElectronPassed", " pElectronPassed ", 55, 0., 110.);
  ptElectronPassed = new TH1F("ptElectronPassed", " ptElectronPassed ", 55, 0., 110.);
 
  sizeSuperClustersFailed = new TH1F("sizeSuperClustersFailed", "Super Cluster Size - Failed ", 20, 0, 19);
  sizeSuperClustersPassed = new TH1F("sizeSuperClustersPassed", "Super Cluster Size - Passed ", 20, 0, 19);
 
  energySuperClustersPassed = new TH1F("energySuperClustersPassed", "Super Cluster Energy - Passed ", 125, 0, 250.);
  energySuperClustersFailed = new TH1F("energySuperClustersFailed", "Super Cluster Energy - Failed ", 125, 0, 250.);
 
  eOverPFailed = new TH1F("eOverPFailed", " E over P - Failed ", 50, 0, 10.);
  eOverPPassed = new TH1F("eOverPPassed", " E over P - Passed ", 50, 0, 10.);
 
  numSiStereoHits_ = new TH1F("numSiStereoHits", "Number of Si StereoHits", 100, 0, 1000);
  numSiMonoHits_ = new TH1F("numSiMonoHits", "Number of Si MonoHits", 100, 0, 1000);
  numSiMatchedHits_ = new TH1F("numSiMatchedHits", "Number of Si MatchedHits", 100, 0, 1000);
 
 
  mctruthProducer_ = iConfig.getParameter<std::string>("mctruthProducer");
  mctruthCollection_ = iConfig.getParameter<std::string>("mctruthCollection");
 
  superClusterProducer_ = iConfig.getParameter<std::string>("superClusterProducer");
  superClusterCollection_ = iConfig.getParameter<std::string>("superClusterCollection");
 
  eBRecHitProducer_ = iConfig.getParameter<std::string>("recHitProducer");
  eBRecHitCollection_ = iConfig.getParameter<std::string>("recHitCollection");
 
  siElectronProducer_ = iConfig.getParameter<std::string>("siElectronProducer");
  siElectronCollection_ = iConfig.getParameter<std::string>("siElectronCollection");
 
  electronProducer_ = iConfig.getParameter<std::string>("electronProducer");
  electronCollection_ = iConfig.getParameter<std::string>("electronCollection");
 
  siHitProducer_ = iConfig.getParameter<std::string>("siHitProducer");
  siRphiHitCollection_ = iConfig.getParameter<std::string>("siRphiHitCollection");
  siStereoHitCollection_ = iConfig.getParameter<std::string>("siStereoHitCollection");
  siMatchedHitCollection_ = iConfig.getParameter<std::string>("siMatchedHitCollection");
}
 
// SiStripElectronAnalyzer::SiStripElectronAnalyzer(const SiStripElectronAnalyzer& rhs)
// {
//    // do actual copying here;
// }
 
SiStripElectronAnalyzer::~SiStripElectronAnalyzer() {
  // do anything here that needs to be done at desctruction time
  // (e.g. close files, deallocate resources etc.)
 
  file_->Write();
  file_->Close();
}
 
//
// assignment operators
//
// const SiStripElectronAnalyzer& SiStripElectronAnalyzer::operator=(const SiStripElectronAnalyzer& rhs)
// {
//   //An exception safe implementation is
//   SiStripElectronAnalyzer temp(rhs);
//   swap(rhs);
//
//   return *this;
// }
 
//
// member functions
//
// init for TTree
void SiStripElectronAnalyzer::beginJob() {
  myTree_ = new TTree("myTree", "my first Tree example");
 
  myTree_->Branch("NShowers", &NShowers_, "NShowers/I");
 
  // first specify the ECAL clusters
  // need to explicitly include array length.
  myTree_->Branch("EShower", &EShower_, "EShower[1000]/F");
  myTree_->Branch("XShower", &XShower_, "XShower[1000]/F");
  myTree_->Branch("YShower", &YShower_, "YShower[1000]/F");
  myTree_->Branch("ZShower", &ZShower_, "ZShower[1000]/F");
 
  // second specify the Si Stereo Hits
  myTree_->Branch("NStereoHits", &NStereoHits_, "NStereoHits/I");
  myTree_->Branch("StereoHitX", &StereoHitX_, "StereoHitX[1000]/F");
  myTree_->Branch("StereoHitY", &StereoHitY_, "StereoHitY[1000]/F");
  myTree_->Branch("StereoHitZ", &StereoHitZ_, "StereoHitZ[1000]/F");
 
  myTree_->Branch("StereoHitR", &StereoHitR_, "StereoHitR[1000]/F");
  myTree_->Branch("StereoHitPhi", &StereoHitPhi_, "StereoHitPhi[1000]/F");
  myTree_->Branch("StereoHitTheta", &StereoHitTheta_, "StereoHitTheta[1000]/F");
 
  myTree_->Branch("StereoHitSigX", &StereoHitSigX_, "StereoHitSigX[1000]/F");
  myTree_->Branch("StereoHitSigY", &StereoHitSigY_, "StereoHitSigY[1000]/F");
  myTree_->Branch("StereoHitCorr", &StereoHitCorr_, "StereoHitCorr[1000]/F");
 
  myTree_->Branch("StereoHitSignal", &StereoHitSignal_, "StereoHitSignal[1000]/F");
  myTree_->Branch("StereoHitNoise", &StereoHitNoise_, "StereoHitNoise[1000]/F");
  myTree_->Branch("StereoHitWidth", &StereoHitWidth_, "StereoHitWidth[1000]/I");
 
  myTree_->Branch("StereoDetector", &StereoDetector_, "StereoDetector[1000]/I");
  myTree_->Branch("StereoLayer", &StereoLayer_, "StereoLayer[1000]/I");
 
  // specify the Si mono (rphi) hits
  myTree_->Branch("NMonoHits", &NMonoHits_, "NMonoHits/I");
  myTree_->Branch("MonoHitX", &MonoHitX_, "MonoHitX[1000]/F");
  myTree_->Branch("MonoHitY", &MonoHitY_, "MonoHitY[1000]/F");
  myTree_->Branch("MonoHitZ", &MonoHitZ_, "MonoHitZ[1000]/F");
 
  myTree_->Branch("MonoHitR", &MonoHitR_, "MonoHitR[1000]/F");
  myTree_->Branch("MonoHitPhi", &MonoHitPhi_, "MonoHitPhi[1000]/F");
  myTree_->Branch("MonoHitTheta", &MonoHitTheta_, "MonoHitTheta[1000]/F");
 
  myTree_->Branch("MonoHitSigX", &MonoHitSigX_, "MonoHitSigX[1000]/F");
  myTree_->Branch("MonoHitSigY", &MonoHitSigY_, "MonoHitSigY[1000]/F");
  myTree_->Branch("MonoHitCorr", &MonoHitCorr_, "MonoHitCorr[1000]/F");
 
  myTree_->Branch("MonoHitSignal", &MonoHitSignal_, "MonoHitSignal[1000]/F");
  myTree_->Branch("MonoHitNoise", &MonoHitNoise_, "MonoHitNoise[1000]/F");
  myTree_->Branch("MonoHitWidth", &MonoHitWidth_, "MonoHitWidth[1000]/I");
 
  myTree_->Branch("MonoDetector", &MonoDetector_, "MonoDetector[1000]/I");
  myTree_->Branch("MonoLayer", &MonoLayer_, "MonoLayer[1000]/I");
 
  // specify the Si matched (rphi) hits
  myTree_->Branch("NMatchedHits", &NMatchedHits_, "NMatchedHits/I");
  myTree_->Branch("MatchedHitX", &MatchedHitX_, "MatchedHitX[1000]/F");
  myTree_->Branch("MatchedHitY", &MatchedHitY_, "MatchedHitY[1000]/F");
  myTree_->Branch("MatchedHitZ", &MatchedHitZ_, "MatchedHitZ[1000]/F");
 
  myTree_->Branch("MatchedHitR", &MatchedHitR_, "MatchedHitR[1000]/F");
  myTree_->Branch("MatchedHitPhi", &MatchedHitPhi_, "MatchedHitPhi[1000]/F");
  myTree_->Branch("MatchedHitTheta", &MatchedHitTheta_, "MatchedHitTheta[1000]/F");
 
  myTree_->Branch("MatchedHitSigX", &MatchedHitSigX_, "MatchedHitSigX[1000]/F");
  myTree_->Branch("MatchedHitSigY", &MatchedHitSigY_, "MatchedHitSigY[1000]/F");
  myTree_->Branch("MatchedHitCorr", &MatchedHitCorr_, "MatchedHitCorr[1000]/F");
 
  myTree_->Branch("MatchedHitSignal", &MatchedHitSignal_, "MatchedHitSignal[1000]/F");
  myTree_->Branch("MatchedHitNoise", &MatchedHitNoise_, "MatchedHitNoise[1000]/F");
  myTree_->Branch("MatchedHitWidth", &MatchedHitWidth_, "MatchedHitWidth[1000]/I");
 
  myTree_->Branch("MatchedDetector", &MatchedDetector_, "MatchedDetector[1000]/I");
  myTree_->Branch("MatchedLayer", &MatchedLayer_, "MatchedLayer[1000]/I");
}
 
void SiStripElectronAnalyzer::initNtuple() {
  LogDebug("") << " In initNtuple ";
 
  NShowers_ = -999;
  for (int init = 0; init < myMaxHits; ++init) {
    EShower_[init] = -999.;
    XShower_[init] = -999.;
    YShower_[init] = -999.;
    ZShower_[init] = -999.;
  }
  NStereoHits_ = -999;
 
  for (int init = 0; init < myMaxHits; ++init) {
    StereoHitX_[init] = -999.;
    StereoHitY_[init] = -999.;
    StereoHitZ_[init] = -999.;
    StereoHitR_[init] = -999.;
    StereoHitPhi_[init] = -999.;
    StereoHitTheta_[init] = -999.;
 
    StereoHitSignal_[init] = -999.;
    StereoHitNoise_[init] = -999.;
    StereoHitWidth_[init] = -999;
    ;
  }
 
  NMonoHits_ = -999;
  for (int init = 0; init < myMaxHits; ++init) {
    MonoHitX_[init] = -999.;
    MonoHitY_[init] = -999.;
    MonoHitZ_[init] = -999.;
    MonoHitR_[init] = -999.;
    MonoHitPhi_[init] = -999.;
    MonoHitTheta_[init] = -999.;
 
    MonoHitSignal_[init] = -999.;
    MonoHitNoise_[init] = -999.;
    MonoHitWidth_[init] = -999;
    ;
  }
 
  NMatchedHits_ = -999;
  for (int init = 0; init < myMaxHits; ++init) {
    MatchedHitX_[init] = -999.;
    MatchedHitY_[init] = -999.;
    MatchedHitZ_[init] = -999.;
    MatchedHitR_[init] = -999.;
    MatchedHitPhi_[init] = -999.;
    MatchedHitTheta_[init] = -999.;
 
    MatchedHitSignal_[init] = -999.;
    MatchedHitNoise_[init] = -999.;
    MatchedHitWidth_[init] = -999;
    ;
  }
}
 
// ------------ method called to produce the data  ------------
void SiStripElectronAnalyzer::analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup) {
  //Retrieve tracker topology from geometry
  edm::ESHandle<TrackerTopology> tTopo;
  iSetup.get<TrackerTopologyRcd>().get(tTopo);
 
  using namespace std;  // so you can say "cout" and "endl"
 
  initNtuple();
 
  // http://cmsdoc.cern.ch/swdev/lxr/CMSSW/source/clhep/CLHEP/HepMC/GenParticle.h
  // http://cmsdoc.cern.ch/swdev/lxr/CMSSW/source/clhep/CLHEP/HepMC/GenVertex.h
  // removed by JED - causes trouble in release post 0_9_0
  //   edm::Handle<edm::HepMCProduct> mctruthHandle;
  //   iEvent.getByLabel(mctruthProducer_, mctruthCollection_, mctruthHandle);
  //   HepMC::GenEvent mctruth = mctruthHandle->getHepMCData();
 
  //   for (HepMC::GenEvent::particle_const_iterator partIter = mctruth.particles_begin();
  //    partIter != mctruth.particles_end();
  //    ++partIter) {
  // //    for (HepMC::GenEvent::vertex_const_iterator vertIter = mctruth.vertices_begin();
  // //     vertIter != mctruth.vertices_end();
  // //     ++vertIter) {
  //    CLHEP::HepLorentzVector creation = (*partIter)->CreationVertex();
  //    CLHEP::HepLorentzVector momentum = (*partIter)->Momentum();
  //   HepPDT::ParticleID id = (*partIter)->particleID();  // electrons and positrons are 11 and -11
  //     edm::LogInfo("") << "MC particle id " << id.pid() << ", creationVertex " << creation << " cm, initialMomentum " << momentum << " GeV/c" << endl;
  //  }
 
  // load the rechits for the Ecal
  edm::Handle<EcalRecHitCollection> pRecHits;
  iEvent.getByLabel(eBRecHitProducer_, eBRecHitCollection_, pRecHits);
  // Create a pointer to the RecHits  - unused for now
  //  const EcalRecHitCollection *hitCollection = pRecHits.product();
 
  // http://cmsdoc.cern.ch/swdev/lxr/CMSSW/source/self/DataFormats/EgammaReco/interface/SuperCluster.h
  edm::Handle<reco::SuperClusterCollection> clusterHandle;
  iEvent.getByLabel(superClusterProducer_, superClusterCollection_, clusterHandle);
 
 
  LogDebug("") << " Start loop over " << clusterHandle->end() - clusterHandle->begin() << "  superClusters ";
 
  for (reco::SuperClusterCollection::const_iterator clusterIter = clusterHandle->begin();
       clusterIter != clusterHandle->end();
       ++clusterIter) {
    double energy = clusterIter->energy();
    math::XYZPoint position = clusterIter->position();
    std::ostringstream str;
 
    str << " SuperCluster " << energy << " GeV, position " << position << " cm"
        << "\n";
 
    energySuperClusters_->Fill(energy);
    sizeSuperClusters_->Fill(clusterIter->clustersSize());
    // this only makes sense for hybrid superclusters
 
    // try to point to the constituent clusters for this SuperCluster
 
    str << "About to loop over basicClusters"
        << "\n";
 
    double emaxSuperCluster = 0.;
    double phibar = 0.;
    double phi2bar = 0.;
    double eTotSuperCluster = 0.;
 
    for (reco::CaloCluster_iterator basicClusterIter = clusterIter->clustersBegin();
         basicClusterIter != clusterIter->clustersEnd();
         ++basicClusterIter) {
      //std::vector<DetId> theIds= (*basicClusterIter)->getHitsByDetId();
 
      str << " basicCluster Energy " << (*basicClusterIter)->energy() << " Position " << (*basicClusterIter)->position()
          << " \n"
          << "        Position phi " << (*basicClusterIter)->position().phi() << " recHits "
          << (*basicClusterIter)->size() << " \n";
 
      double eCluster = (*basicClusterIter)->energy();
      if (eCluster > emaxSuperCluster) {
        emaxSuperCluster = eCluster;
      }
      eTotSuperCluster += eCluster;
      double phiCluster = (*basicClusterIter)->position().phi();
      phibar += eCluster * phiCluster;
      phi2bar += eCluster * phiCluster * phiCluster;
 
    }  // end of basicClusterIter loop
 
    phibar = phibar / eTotSuperCluster;
    phi2bar = phi2bar / eTotSuperCluster;
    double phiWidth = phi2bar - phibar * phibar;
    if (phiWidth > 0.) {
      phiWidth = std::pow(phiWidth, 0.5);
    } else {
      phiWidth = 0.;
    }
    str << " SuperCluster stats "
        << "\n";
    str << "phibar " << phibar << " phi2bar " << phi2bar << " eTotSuperCluster " << eTotSuperCluster << " phiWidth "
        << phiWidth << std::endl;
 
    phiWidthSuperClusters_->Fill(phiWidth);
 
    emaxSuperClusters_->Fill(emaxSuperCluster);
 
    str << " Done with this SuperCluster " << std::endl;
 
    LogDebug("") << str.str();
 
  }  // end of loop over superClusters
 
  LogDebug("") << " End loop over superClusters ";
 
 
  //
  // loop over all EcalRecHits and print out their x,y,z,E
  //  edm::LogInfo("") << " Dumping all recHits in this event " << endl ;
  // for(EcalRecHitCollection::const_iterator _blah = hitCollection->begin();
  //     _blah != hitCollection->end() ; ++_blah ) {
  //   edm::LogInfo("") << "Ecal RecHit Energy: " << _blah->energy() << endl ;
  //   //      " Position " << _blah.position() << endl ;
  //  }
  //
  //  edm::LogInfo("") << "Dump finished " << endl ;
  //
 
  // DataFormats/EgammaCandidates/src/SiStripElectron.cc
  edm::Handle<reco::SiStripElectronCollection> siStripElectronHandle;
  iEvent.getByLabel(siElectronProducer_, siElectronCollection_, siStripElectronHandle);
 
 
  LogDebug("") << " Dumping Algo's guess of SiStripElectron Candidate Info ";
  int numberOfElectrons = 0;
  // need to check if fit succeeded
  LogDebug("") << " Number of SiStripElectrons  " << siStripElectronHandle->size();
 
  for (reco::SiStripElectronCollection::const_iterator electronIter = siStripElectronHandle->begin();
       electronIter != siStripElectronHandle->end();
       ++electronIter) {
    LogDebug("") << "about to get stuff from electroncandidate " << numberOfElectrons << "\n"
                 << "supercluster energy = " << electronIter->superCluster()->energy() << "\n"
                 << "fit results are phi(r) = " << electronIter->phiAtOrigin() << " + " << electronIter->phiVsRSlope()
                 << "*r"
                 << "\n"
                 << " chi2 " << electronIter->chi2() << " ndof " << electronIter->ndof() << "\n"
                 << " Pt " << electronIter->pt() << "\n"
                 << "P, Px, Py, Pz  " << electronIter->p() << " " << electronIter->px() << " " << electronIter->py()
                 << " " << electronIter->pz() << "\n"
                 << "you get the idea...";
 
    // make plots for supercluster that an electron has been associ w/. here
    energySuperClustersEl_->Fill(electronIter->superCluster()->energy());
    sizeSuperClustersEl_->Fill(electronIter->superCluster()->clustersSize());
 
    // loop over basicClusters to get energy
    double emaxSuperCluster = 0.;
    double phibar = 0.;
    double phi2bar = 0.;
    double eTotSuperCluster = 0.;
 
    for (reco::CaloCluster_iterator basicClusterIter = electronIter->superCluster()->clustersBegin();
         basicClusterIter != electronIter->superCluster()->clustersEnd();
         ++basicClusterIter) {
      //std::vector<DetId> theIds= (*basicClusterIter)->getHitsByDetId();
 
      double eCluster = (*basicClusterIter)->energy();
      if (eCluster > emaxSuperCluster) {
        emaxSuperCluster = eCluster;
      }
      eTotSuperCluster += eCluster;
      double phiCluster = (*basicClusterIter)->position().phi();
      phibar += eCluster * phiCluster;
      phi2bar += eCluster * phiCluster * phiCluster;
    }
 
    phibar = phibar / eTotSuperCluster;
    phi2bar = phi2bar / eTotSuperCluster;
    double phiWidth = phi2bar - phibar * phibar;
    if (phiWidth > 0.) {
      phiWidth = std::pow(phiWidth, 0.5);
    } else {
      phiWidth = 0.;
    }
 
    phiWidthSuperClustersEl_->Fill(phiWidth);
 
    emaxSuperClustersEl_->Fill(emaxSuperCluster);
 
    numberOfElectrons++;
  }
 
  numCand_->Fill(siStripElectronHandle->size());
 
 
  // Now loop over the electrons (ie the fitted things.)
 
  LogDebug("") << " About to check Electrons";
 
  edm::Handle<reco::ElectronCollection> electrons;
  iEvent.getByLabel(electronProducer_, electronCollection_, electrons);
 
  numElectrons_->Fill(electrons->end() - electrons->begin());
 
  // set up vector of bool for SiStrips having or not having Electrons
  // this causes a warning because of variable array size at compilation time ;
  // BAD  bool hasElectron_[siStripElectronHandle->end()- siStripElectronHandle->begin()] ;
  bool* hasElectron_ = new bool[siStripElectronHandle->end() - siStripElectronHandle->begin()];
  for (int icount = 0; icount < siStripElectronHandle->end() - siStripElectronHandle->begin(); ++icount) {
    hasElectron_[icount] = false;
  }
 
  // also set up a counter to associate the ith electron to the jth strippy
  // Electron_to_strippy[i] = j: i-th Electron is j-th strippy
  // BAD  unsigned int Electron_to_strippy[electrons->end()- electrons->begin()];
  unsigned int* Electron_to_strippy = new unsigned int[electrons->end() - electrons->begin()];
  for (int icount = 0; icount < electrons->end() - electrons->begin(); ++icount) {
    Electron_to_strippy[icount] = 0;
  }
 
  unsigned int ecount = 0;
  for (reco::ElectronCollection::const_iterator electronIter = electrons->begin(); electronIter != electrons->end();
       ++electronIter) {
    LogDebug("") << " Associating Electrons to Strippies ";
    LogDebug("") << " PT is " << electronIter->track()->pt();
 
    reco::TrackRef tr = (*electronIter).track();
    uint32_t id = (*electronIter->track()->recHitsBegin())->geographicalId().rawId();
    LocalPoint pos = (*electronIter->track()->recHitsBegin())->localPosition();
 
    unsigned int icount = 0;
    LogDebug("") << " About to loop over Strippies "
                 << " \n "
                 << " icount " << icount << " max " << siStripElectronHandle->end() - siStripElectronHandle->begin();
 
    for (reco::SiStripElectronCollection::const_iterator strippyiter = siStripElectronHandle->begin();
         strippyiter != siStripElectronHandle->end();
         ++strippyiter) {
      bool hitInCommon = false;
      // loop over rphi hits
      for (std::vector<SiStripRecHit2D>::const_iterator hiter = strippyiter->rphiRecHits().begin();
           hiter != strippyiter->rphiRecHits().end();
           ++hiter) {
        if (hiter->geographicalId().rawId() == id && (hiter->localPosition() - pos).mag() < 1e-10) {
          hitInCommon = true;
          break;
        }
      }
 
      for (std::vector<SiStripRecHit2D>::const_iterator hiter = strippyiter->stereoRecHits().begin();
           hiter != strippyiter->stereoRecHits().end();
           ++hiter) {
        if (hiter->geographicalId().rawId() == id && (hiter->localPosition() - pos).mag() < 1e-10) {
          hitInCommon = true;
          break;
        }
      }
      if (hitInCommon) {  //this Electron belongs to this SiStripElectron.
        hasElectron_[icount] = true;
        Electron_to_strippy[ecount] = icount;
        ptDiff->Fill(std::abs(electronIter->track()->pt()) - std::abs(strippyiter->pt()));
        pDiff->Fill(std::abs(electronIter->track()->p()) - std::abs(strippyiter->p()));
      }
      icount++;
    }  // Sistrip loop
    ecount++;
  }  // Electrons
 
  LogDebug("") << " Done looping over Electrons ";
 
  unsigned int counter = 0;
  for (reco::SiStripElectronCollection::const_iterator strippyIter = siStripElectronHandle->begin();
       strippyIter != siStripElectronHandle->end();
       ++strippyIter) {
    bool skipThis = !hasElectron_[counter];
    if (skipThis) {
      // plot stuff for SIStripElectrons that don't have fits associated
 
      LogDebug("") << " SiStrip Failed Electron "
                   << " \n "
                   << " p " << strippyIter->p() << " \n "
                   << " pt " << strippyIter->pt() << " \n "
                   << " SuperClust size " << strippyIter->superCluster()->clustersSize();
 
      pElectronFailed->Fill(std::abs(strippyIter->p()));
      ptElectronFailed->Fill(std::abs(strippyIter->pt()));
      sizeSuperClustersFailed->Fill(strippyIter->superCluster()->clustersSize());
      LogDebug("") << " done filling Failed histos ";
      //      energySuperClustersFailed->Fill(strippyIter->superCluster()->energy());
      //       if(strippyIter->p()>0.) {
      //    eOverPFailed->Fill(strippyIter->superCluster()->energy()/strippyIter->p());
      //       }else {
      //    eOverPFailed->Fill(-1.0);
      //       }
 
    } else {
      LogDebug("") << " SiStrip Passed Electron "
                   << " \n "
                   << " p " << strippyIter->p() << " \n "
                   << " pt " << strippyIter->pt() << " \n "
                   << " SuperClust size " << strippyIter->superCluster()->clustersSize();
      pElectronPassed->Fill(std::abs(strippyIter->p()));
      ptElectronPassed->Fill(std::abs(strippyIter->pt()));
      sizeSuperClustersPassed->Fill(strippyIter->superCluster()->clustersSize());
      LogDebug("") << " done filling passed histos ";
      //      energySuperClustersPassed->Fill(strippyIter->superCluster()->energy());
      //       if(strippyIter->p()>0.) {
      //    eOverPPassed->Fill(strippyIter->superCluster()->energy()/strippyIter->p());
      //       }else {
      //    eOverPPassed->Fill(-1.0);
      //       }
 
    }  // skipThis
    counter++;
  }
 
  LogDebug("") << "Dump info for all electrons ";
 
  for (reco::ElectronCollection::const_iterator electronIter1 = electrons->begin(); electronIter1 != electrons->end();
       ++electronIter1) {
    reco::TrackRef tr1 = (*electronIter1).track();
    // let's find its associated SiStripElectron and SuperCluster
    unsigned int ecount1 = electronIter1 - electrons->begin();
    unsigned int stripCount1 = 0;
    reco::SiStripElectronCollection::const_iterator strippyIter1;
    for (reco::SiStripElectronCollection::const_iterator strippyIter = siStripElectronHandle->begin();
         strippyIter != siStripElectronHandle->end();
         ++strippyIter) {
      if (Electron_to_strippy[ecount1] == stripCount1) {
        strippyIter1 = strippyIter;
        break;
      }
      stripCount1++;
    }  // strippy loop
    ecount1++;
 
    std::ostringstream str;
 
    str << " SiStripElect p , px, py, pz " << strippyIter1->p() << "  " << strippyIter1->px() << "  "
        << strippyIter1->py() << "  " << strippyIter1->pz() << "\n " << std::endl;
 
    str << " Electron p px, py, pz,  = " << tr1->p() << "  " << tr1->px() << "  " << tr1->py() << "  " << tr1->pz()
        << "\n"
        << std::endl;
 
    double EClust1 = strippyIter1->superCluster()->energy();
    double XClust1 = strippyIter1->superCluster()->x();
    double YClust1 = strippyIter1->superCluster()->y();
    double ZClust1 = strippyIter1->superCluster()->z();
 
    double rho1 = sqrt(XClust1 * XClust1 + YClust1 * YClust1 + ZClust1 * ZClust1);
    double costheta1 = ZClust1 / rho1;
    double sintheta1 = sqrt(1 - costheta1 * costheta1);
    if (ZClust1 < 0) {
      sintheta1 = -sintheta1;
    }
    double cosphi1 = XClust1 / sqrt(XClust1 * XClust1 + YClust1 * YClust1);
    double sinphi1 = YClust1 / sqrt(XClust1 * XClust1 + YClust1 * YClust1);
 
    str << " Ecal for electron E, px, py, pz " << EClust1 << " " << EClust1 * sintheta1 * cosphi1 << " "
        << EClust1 * sintheta1 * sinphi1 << " " << EClust1 * costheta1 << "\n"
        << std::endl;
 
    LogDebug("") << str.str();
 
  }  // loop over electrons
  LogDebug("") << "Done Dumping info for all electrons ";
 
  // LogDebug("")<< " Checking Electrons" ;
  //  LogDebug("")<< " PT is " << electronIter->track()->pt() ;
  //    reco::TrackRef tr =(*electronIter).track();
  if (electrons->end() - electrons->begin() > 1) {
    edm::LogInfo("") << " Two electrons in this event " << std::endl;
    for (reco::ElectronCollection::const_iterator electronIter1 = electrons->begin();
         electronIter1 != electrons->end() - 1;
         ++electronIter1) {
      reco::TrackRef tr1 = (*electronIter1).track();
 
      // let's find its associated SiStripElectron and SuperCluster
      // use the Electron_to_strippy[] array
      unsigned int ecount1 = electronIter1 - electrons->begin();
      // loop over strippies to find the corresponding one
      unsigned int stripCount1 = 0;
      reco::SiStripElectronCollection::const_iterator strippyIter1;
      for (reco::SiStripElectronCollection::const_iterator strippyIter = siStripElectronHandle->begin();
           strippyIter != siStripElectronHandle->end();
           ++strippyIter) {
        if (Electron_to_strippy[ecount1] == stripCount1) {
          strippyIter1 = strippyIter;
          break;
        }
        stripCount1++;
      }  // strippy loop
 
      double EClust1 = strippyIter1->superCluster()->energy();
      double XClust1 = strippyIter1->superCluster()->x();
      double YClust1 = strippyIter1->superCluster()->y();
      double ZClust1 = strippyIter1->superCluster()->z();
 
      for (reco::ElectronCollection::const_iterator electronIter2 = electronIter1 + 1;
           electronIter2 != electrons->end();
           ++electronIter2) {
        reco::TrackRef tr2 = (*electronIter2).track();
 
        unsigned int ecount2 = electronIter2 - electrons->begin();
        unsigned int stripCount2 = 0;
        reco::SiStripElectronCollection::const_iterator strippyIter2;
        for (reco::SiStripElectronCollection::const_iterator strippyIter = siStripElectronHandle->begin();
             strippyIter != siStripElectronHandle->end();
             ++strippyIter) {
          if (Electron_to_strippy[ecount2] == stripCount2) {
            strippyIter2 = strippyIter;
            break;
          }
          stripCount2++;
        }  // strippy loop
 
        double EClust2 = strippyIter2->superCluster()->energy();
        double XClust2 = strippyIter2->superCluster()->x();
        double YClust2 = strippyIter2->superCluster()->y();
        double ZClust2 = strippyIter2->superCluster()->z();
 
        // now get supercluster from this:
 
        edm::LogInfo("") << " Electron p1 = " << tr1->p() << " p1x " << tr1->px() << " p1y " << tr1->py() << " p1z "
                         << tr1->pz() << std::endl;
 
        edm::LogInfo("") << " Electron p2 = " << tr2->p() << " p2x " << tr2->px() << " p2y " << tr2->py() << " p2z "
                         << tr2->pz() << std::endl;
 
        // combine the two in an (e,e) pair
        double Zpx = tr1->px() + tr2->px();
        double Zpy = tr1->py() + tr2->py();
        double Zpz = tr1->pz() + tr2->pz();
        double Ze = std::abs(tr1->p()) + std::abs(tr2->p());
        edm::LogInfo("") << " Z mass " << sqrt(Ze * Ze - Zpx * Zpx - Zpy * Zpy - Zpz * Zpz) << std::endl;
 
        // combine the SuperClusts into a Z
        double rho1 = sqrt(XClust1 * XClust1 + YClust1 * YClust1 + ZClust1 * ZClust1);
        double costheta1 = ZClust1 / rho1;
        double sintheta1 = sqrt(1 - costheta1 * costheta1);
        if (ZClust1 < 0) {
          sintheta1 = -sintheta1;
        }
        double cosphi1 = XClust1 / sqrt(XClust1 * XClust1 + YClust1 * YClust1);
        double sinphi1 = YClust1 / sqrt(XClust1 * XClust1 + YClust1 * YClust1);
 
        double rho2 = sqrt(XClust2 * XClust2 + YClust2 * YClust2 + ZClust2 * ZClust2);
        double costheta2 = ZClust2 / rho2;
        double sintheta2 = sqrt(1 - costheta2 * costheta2);
        if (ZClust2 < 0) {
          sintheta2 = -sintheta2;
        }
        double cosphi2 = XClust2 / sqrt(XClust2 * XClust2 + YClust2 * YClust2);
        double sinphi2 = YClust2 / sqrt(XClust2 * XClust2 + YClust2 * YClust2);
 
        edm::LogInfo("") << "Energy of supercluster for 1st electron " << EClust1 << " "
                         << EClust1 * sintheta1 * cosphi1 << " " << EClust1 * sintheta1 * sinphi1 << " "
                         << EClust1 * costheta1 << " " << std::endl;
 
        edm::LogInfo("") << "Energy of supercluster for 2nd electron " << EClust2 << " "
                         << EClust2 * sintheta2 * cosphi2 << " " << EClust2 * sintheta2 * sinphi2 << " "
                         << EClust2 * costheta2 << " " << std::endl;
 
        // get the supercluster pair
        double Zgpx = EClust1 * sintheta1 * cosphi1 + EClust2 * sintheta2 * cosphi2;
        double Zgpy = EClust1 * sintheta1 * sinphi1 + EClust2 * sintheta2 * sinphi2;
        double Zgpz = EClust1 * costheta1 + EClust2 * costheta2;
        double ZgE = EClust1 + EClust2;
 
        edm::LogInfo("") << " Z mass from ECAL " << sqrt(ZgE * ZgE - Zgpx * Zgpx - Zgpy * Zgpy - Zgpz * Zgpz)
                         << std::endl;
 
      }  //inner loop
    }    // outer loop
  }      // m(ee) loop
 
  delete[] hasElectron_;
  delete[] Electron_to_strippy;
 
  LogDebug("") << " About to dump tracker info ";
 
  edm::ESHandle<TrackerGeometry> trackerHandle;
  iSetup.get<TrackerDigiGeometryRecord>().get(trackerHandle);
 
  edm::Handle<SiStripRecHit2DCollection> rphiHitsHandle;
  iEvent.getByLabel(siHitProducer_, siRphiHitCollection_, rphiHitsHandle);
 
  edm::Handle<SiStripRecHit2DCollection> stereoHitsHandle;
  iEvent.getByLabel(siHitProducer_, siStereoHitCollection_, stereoHitsHandle);
 
  edm::Handle<SiStripMatchedRecHit2DCollection> matchedHitsHandle;
  iEvent.getByLabel(siHitProducer_, siMatchedHitCollection_, matchedHitsHandle);
 
 
  NShowers_ = 0;
  for (reco::SuperClusterCollection::const_iterator clusterIter = clusterHandle->begin();
       clusterIter != clusterHandle->end();
       ++clusterIter) {
    double energy = clusterIter->energy();
    math::XYZPoint position = clusterIter->position();
    if (NShowers_ < myMaxHits) {
      EShower_[NShowers_] = energy;
      XShower_[NShowers_] = position.x();
      YShower_[NShowers_] = position.y();
      ZShower_[NShowers_] = position.z();
      ++NShowers_;
    }
    // Loop over all crystals in this supercluster - see
    // RecoEcal/EgamaClusterProducers/src/EgammaSimpleAnalyzer.cc
    // Look also at DataFormats/EgammaReco/interface/SuperCluster.h
  }
  numSuperClusters_->Fill(NShowers_);
 
  LogDebug("") << " Looping over stereo hits ";
 
  int myHits = 0;
  for (SiStripRecHit2DCollection::DataContainer::const_iterator hit = stereoHitsHandle->data().begin(),
                                                                hitend = stereoHitsHandle->data().end();
       hit != hitend;
       ++hit) {
    DetId id(hit->geographicalId());
    if ((hit->geographicalId()).subdetId() == StripSubdetector::TIB ||
        (hit->geographicalId()).subdetId() == StripSubdetector::TOB) {
      GlobalPoint position = trackerHandle->idToDet(hit->geographicalId())->surface().toGlobal(hit->localPosition());
      //from RecoLocalTracker/SiStripClusterizer/test/TestCluster.cc
      // cf also TrackHitAssociator.cc SiStripRecHitMatcher.cc SiStrip1DMeasurementTransformator.cc (KalmanUpdators)
      SiStripRecHit2D const rechit = *hit;
      //    LocalPoint myposition = rechit.localPosition() ;
      LocalError myerror = rechit.localPositionError();
 
      // Get layer and subdetector ID here for this hit
      // see SiStripRecHitConverter/test/ValHit.cc
      Int_t siLayerNum = 0;
      Int_t siDetNum = 0;
      string siDetName = "";
      if ((hit->geographicalId()).subdetId() == StripSubdetector::TIB) {
        //     siLayerNum = tTopo->tibLayer(rechit->geographicalID());
        siLayerNum = tTopo->tibLayer(id);
        siDetNum = 1;
        siDetName = "TIB";
      } else if ((hit->geographicalId()).subdetId() == StripSubdetector::TOB) {
        siLayerNum = tTopo->tobLayer(id);
        siDetNum = 2;
        siDetName = "TOB";
        //      } else if ( (hit->geographicalId()).subdetId() == StripSubdetector::TID ){
        //    // should we use side/wheel/ring/module/stereo() ?
        //    siLayerNum = tTopo->tidWheel(id);
        //    siDetNum = 3 ;
        //    siDetName = "TID" ;
        //  }else if ( (hit->geographicalId()).subdetId() == StripSubdetector::TEC ){
        //    //choices are side/petal/wheel/ring/module/glued/stereo
        //    siLayerNum = tTopo->tecWheel(id);
        //    siDetNum = 4 ;
        //    siDetName = "TEC" ;
      } else {
        siLayerNum = -999;
        siDetNum = -999;
        siDetName = "NULL";
      }
      //    LogDebug("") << siDetName << " " << siLayerNum ;
 
      const SiStripRecHit2D::ClusterRef& clust = rechit.cluster();
      double Signal = 0;
      double Noise2 = 0;
      int StripCount = 0;
      if (clust.isNonnull()) {
        //    LogDebug("") << " barycenter " << clust->barycenter() ;
        //    const std::vector<uint16_t> amplitudes=clust->amplitudes();
        const auto& amplitudes = clust->amplitudes();
        for (size_t i = 0; i < amplitudes.size(); i++) {
          Signal += amplitudes[i];
          //ignore for now       Noise2 +=SiStripNoiseService_.getNoise(detid,clust->firstStrip()+i)*SiStripNoiseService_.getNoise(detid,clust->firstStrip()+i);
          StripCount++;
        }
      } else {
        LogDebug("") << " null cluster ";
      }
      //    LogDebug("") << "Signal " << Signal << " Noise2 " << Noise2 << " StripCount " << StripCount ;
      // Dump position
      //    LogDebug("") << " Stereo "
      //             << "local position: "<<myposition.x()<<" "
      //             << myposition.y()<<" "<<myposition.z()<<"\n"
      //             << "local error: "<<myerror.xx()<<" "
      //             << myerror.xy()<<" "<<myerror.yy() << "\n"
      //             << "global position: " << position.x() << " "
      //             <<  position.y()<<" "<< position.z()<<"\n"
      //             << " siDetNum " << siDetNum
      //             << " siLayerNum " << siLayerNum ;
 
      if (myHits < myMaxHits) {
        StereoHitX_[myHits] = position.x();
        StereoHitY_[myHits] = position.y();
        StereoHitZ_[myHits] = position.z();
 
        StereoHitR_[myHits] = position.perp();
        StereoHitPhi_[myHits] = position.phi();
        StereoHitTheta_[myHits] = position.theta();
 
        StereoHitSigX_[myHits] = sqrt(myerror.xx());
        StereoHitSigY_[myHits] = sqrt(myerror.yy());
        StereoHitCorr_[myHits] = myerror.xy() / sqrt(myerror.xx() * myerror.yy());
 
        StereoHitSignal_[myHits] = Signal;
        StereoHitNoise_[myHits] = Noise2;
        StereoHitWidth_[myHits] = StripCount;
 
        StereoDetector_[myHits] = siDetNum;
        StereoLayer_[myHits] = siLayerNum;
 
        ++myHits;
      }
    }  // end if this is the right subdetector
  }    // end loop over hits
  NStereoHits_ = myHits;
 
  numSiStereoHits_->Fill(NStereoHits_);
 
 
  LogDebug("") << " Looping over Mono Hits ";
  myHits = 0;
  for (SiStripRecHit2DCollection::DataContainer::const_iterator hit = rphiHitsHandle->data().begin(),
                                                                hitend = rphiHitsHandle->data().end();
       hit != hitend;
       ++hit) {
    DetId id(hit->geographicalId());
 
    if ((hit->geographicalId()).subdetId() == StripSubdetector::TIB ||
        (hit->geographicalId()).subdetId() == StripSubdetector::TOB) {
      GlobalPoint position = trackerHandle->idToDet(hit->geographicalId())->surface().toGlobal(hit->localPosition());
      //from RecoLocalTracker/SiStripClusterizer/test/TestCluster.cc
      // cf also TrackHitAssociator.cc SiStripRecHitMatcher.cc SiStrip1DMeasurementTransformator.cc (KalmanUpdators)
      SiStripRecHit2D const rechit = *hit;
      //    LocalPoint myposition = rechit.localPosition() ;
      LocalError myerror = rechit.localPositionError();
 
      // Get layer and subdetector ID here for this hit
      // see SiStripRecHitConverter/test/ValHit.cc
      Int_t siLayerNum = 0;
      Int_t siDetNum = 0;
      string siDetName = "";
      if ((hit->geographicalId()).subdetId() == StripSubdetector::TIB) {
        //     siLayerNum = tTopo->tibLayer(rechit->geographicalID());
        siLayerNum = tTopo->tibLayer(id);
        siDetNum = 1;
        siDetName = "TIB";
      } else if ((hit->geographicalId()).subdetId() == StripSubdetector::TOB) {
        siLayerNum = tTopo->tobLayer(id);
        siDetNum = 2;
        siDetName = "TOB";
        //  } else if ( (hit->geographicalId()).subdetId() == StripSubdetector::TID ){
        //    // should we use side/wheel/ring/module/stereo() ?
        //    siLayerNum = tTopo->tidWheel(id);
        //    siDetNum = 3 ;
        //    siDetName = "TID" ;
        //  }else if ( (hit->geographicalId()).subdetId() == StripSubdetector::TEC ){
        //    //choices are side/petal/wheel/ring/module/glued/stereo
        //    siLayerNum = tTopo->tecWheel(id);
        //    siDetNum = 4 ;
        //    siDetName = "TEC"
        ;
      } else {
        siLayerNum = -999;
        siDetNum = -999;
        siDetName = "NULL";
      }
      //    LogDebug("") << siDetName << " " << siLayerNum ;
      const SiStripRecHit2D::ClusterRef& clust = rechit.cluster();
      double Signal = 0;
      double Noise2 = 0;
      int StripCount = 0;
      if (clust.isNonnull()) {
        //    LogDebug("") << " barycenter " << clust->barycenter() ;
        //    const std::vector<uint16_t> amplitudes=clust->amplitudes();
        const auto& amplitudes = clust->amplitudes();
        for (size_t i = 0; i < amplitudes.size(); i++) {
          Signal += amplitudes[i];
          //ignore for now       Noise2 +=SiStripNoiseService_.getNoise(detid,clust->firstStrip()+i)*SiStripNoiseService_.getNoise(detid,clust->firstStrip()+i);
          StripCount++;
        }
      } else {
        LogDebug("") << " null cluster ";
      }
      //    LogDebug("") << "Signal " << Signal << " Noise2 " << Noise2 << " StripCount " << StripCount ;
 
      // Dump position info
      //    LogDebug("") << " Mono "
      //             << "local position: "<<myposition.x()<<" "
      //             << myposition.y()<<" "<<myposition.z()<<"\n"
      //             <<"local error: "<<myerror.xx()<<" "
      //             << myerror.xy()<<" "<<myerror.yy() << "\n"
      //             << "global position: " << position.x() << " "
      //             <<  position.y()<<" "<< position.z()<<"\n"
      //             << " siDetNum " << siDetNum
      //             << " siLayerNum " << siLayerNum ;
 
      if (myHits < myMaxHits) {
        MonoHitX_[myHits] = position.x();
        MonoHitY_[myHits] = position.y();
        MonoHitZ_[myHits] = position.z();
 
        MonoHitR_[myHits] = position.perp();
        MonoHitPhi_[myHits] = position.phi();
        MonoHitTheta_[myHits] = position.theta();
 
        MonoHitSigX_[myHits] = sqrt(myerror.xx());
        MonoHitSigY_[myHits] = sqrt(myerror.yy());
        MonoHitCorr_[myHits] = myerror.xy() / sqrt(myerror.xx() * myerror.yy());
 
        MonoHitSignal_[myHits] = Signal;
        MonoHitNoise_[myHits] = Noise2;
        MonoHitWidth_[myHits] = StripCount;
 
        MonoDetector_[myHits] = siDetNum;
        MonoLayer_[myHits] = siLayerNum;
 
        ++myHits;
      }  // of  if(myHits < myMaxHits)
         // LogDebug("")<< "end of myHits < myMaxHits " ;
    }    // end if this is the right subdetector
         //      LogDebug("")<< "end of TIB/TOB check " ;
  }      // end loop over hits
  //    LogDebug("")<< " end of loop over hits  " ;
  NMonoHits_ = myHits;
 
  numSiMonoHits_->Fill(NMonoHits_);
 
 
  LogDebug("") << "  Loop over Matched Hits ";
 
  myHits = 0;
  for (SiStripMatchedRecHit2DCollection::DataContainer::const_iterator hit = matchedHitsHandle->data().begin(),
                                                                       hitend = matchedHitsHandle->data().end();
       hit != hitend;
       ++hit) {
    DetId id(hit->geographicalId());
    if ((hit->geographicalId()).subdetId() == StripSubdetector::TIB ||
        (hit->geographicalId()).subdetId() == StripSubdetector::TOB) {
      GlobalPoint position = trackerHandle->idToDet(hit->geographicalId())->surface().toGlobal(hit->localPosition());
      SiStripMatchedRecHit2D const rechit = *hit;
      //    LocalPoint myposition = rechit.localPosition() ;
      LocalError myerror = rechit.localPositionError();
 
      // Get layer and subdetector ID here for this hit
      // see SiStripRecHitConverter/test/ValHit.cc
      Int_t siLayerNum = 0;
      Int_t siDetNum = 0;
      string siDetName = "";
      if ((hit->geographicalId()).subdetId() == StripSubdetector::TIB) {
        siLayerNum = tTopo->tibLayer(id);
        siDetNum = 1;
        siDetName = "TIB";
      } else if ((hit->geographicalId()).subdetId() == StripSubdetector::TOB) {
        siLayerNum = tTopo->tobLayer(id);
        siDetNum = 2;
        siDetName = "TOB";
        //      } else if ( (hit->geographicalId()).subdetId() == StripSubdetector::TID ){
        //        // should we use side/wheel/ring/module/stereo() ?
        //        siLayerNum = tTopo->tidWheel(id);
        //        siDetNum = 3 ;
        //        siDetName = "TID" ;
        //      }else if ( (hit->geographicalId()).subdetId() == StripSubdetector::TEC ){
        //        //choices are side/petal/wheel/ring/module/glued/stereo
        //        siLayerNum = tTopo->tecWheel(id);
        //        siDetNum = 4 ;
        //        siDetName = "TEC" ;
      } else {
        siLayerNum = -999;
        siDetNum = -999;
        siDetName = "NULL";
      }
      //    const edm::Ref<edm::DetSetVector<SiStripCluster>, SiStripCluster, edm::refhelper::FindForDetSetVector<SiStripCluster> > clust=rechit.cluster();
      double Signal = 0;
      double Noise2 = 0;
      int StripCount = 0;
      //    if(clust.isNonnull()) {
      //      LogDebug("") << " barycenter " << clust->barycenter() ;
      //      const std::vector<uint16_t> amplitudes=clust->amplitudes();
      //      for(size_t i = 0 ; i<amplitudes.size(); i++ ){
      //        Signal +=amplitudes[i] ;
      //        //ignore for now         Noise2 +=SiStripNoiseService_.getNoise(detid,clust->firstStrip()+i)*SiStripNoiseService_.getNoise(detid,clust->firstStrip()+i);
      //        StripCount++;
      //      }
      //    } else {
      //      LogDebug("") << " null cluster " ;
      //    }
      //    LogDebug("") << "Signal " << Signal << " Noise2 " << Noise2 << " StripCount " << StripCount ;
 
      // Dump position info
      //    LogDebug("") << " Matched "
      //             << "local position: "<<myposition.x()<<" "
      //             << myposition.y()<<" "<<myposition.z()<<"\n"
      //             << "local error: "<<myerror.xx()<<" "
      //             << myerror.xy()<<" "<<myerror.yy() << "\n"
      //             << "global position: " << position.x() << " "
      //             <<  position.y()<<" "<< position.z()<<"\n"
      //             << " siDetNum " << siDetNum
      //             << " siLayerNum " << siLayerNum ;
 
      if (myHits < myMaxHits) {
        MatchedHitX_[myHits] = position.x();
        MatchedHitY_[myHits] = position.y();
        MatchedHitZ_[myHits] = position.z();
 
        MatchedHitR_[myHits] = position.perp();
        MatchedHitPhi_[myHits] = position.phi();
        MatchedHitTheta_[myHits] = position.theta();
 
        MatchedHitSigX_[myHits] = sqrt(myerror.xx());
        MatchedHitSigY_[myHits] = sqrt(myerror.yy());
        MatchedHitCorr_[myHits] = myerror.xy() / sqrt(myerror.xx() * myerror.yy());
 
        MatchedHitSignal_[myHits] = Signal;
        MatchedHitNoise_[myHits] = Noise2;
        MatchedHitWidth_[myHits] = StripCount;
 
        MatchedDetector_[myHits] = siDetNum;
        MatchedLayer_[myHits] = siLayerNum;
 
        ++myHits;
      }
    }  // end if this is the right subdetector (TIB/TOB)
  }    // end loop over hits
  NMatchedHits_ = myHits;
 
  numSiMatchedHits_->Fill(NMatchedHits_);
 
 
  LogDebug("") << "Writing to myTree with " << NShowers_ << " Showers " << NStereoHits_ << " Si StereoHits "
               << NMonoHits_ << " Si MonoHits " << NMatchedHits_ << " Si MatchedHits ";
 
  myTree_->Fill();
 
}  // end of Analyzer
 
void SiStripElectronAnalyzer::endJob() {
  LogDebug("") << "Entering endJob ";
  file_->cd();
  numCand_->Write();
  numElectrons_->Write();
  numSuperClusters_->Write();
 
  energySuperClusters_->Write();
  sizeSuperClusters_->Write();
  emaxSuperClusters_->Write();
  phiWidthSuperClusters_->Write();
 
  energySuperClustersEl_->Write();
  sizeSuperClustersEl_->Write();
  emaxSuperClustersEl_->Write();
  phiWidthSuperClustersEl_->Write();
 
  ptDiff->Write();
  pDiff->Write();
  pElectronFailed->Write();
  ptElectronFailed->Write();
  pElectronPassed->Write();
  ptElectronPassed->Write();
  sizeSuperClustersPassed->Write();
  sizeSuperClustersFailed->Write();
  //   energySuperClustersPassed->Write();
  //   energySuperClustersFailed->Write();
  //   eOverPPassed->Write();
  //   eOverPFailed->Write();
 
  numSiStereoHits_->Write();
  numSiMonoHits_->Write();
  numSiMatchedHits_->Write();
 
  // disable for large dataset
  LogDebug("") << " Writing out ntuple is disabled for now ";
  myTree_->Write();
 
  file_->Close();
}
 
//
// const member functions
//
 
//
// static member functions
//