PVFitter Class Reference

#include <PVFitter.h>

Public Member Functions
void	compressStore ()
	reduce size of primary vertex cache by increasing quality limit More...
void	dumpTxtFile ()
void	FitPerBunchCrossing ()
reco::BeamSpot	getBeamSpot ()
std::map< int, reco::BeamSpot >	getBeamSpotMap ()
int *	getFitLSRange ()
int	getNPVs ()
const std::map< int, int > &	getNPVsperBX ()
std::vector< BeamSpotFitPVData >	getpvStore ()
time_t *	getRefTime ()
double	getWidthX ()
double	getWidthXerr ()
double	getWidthY ()
double	getWidthYerr ()
double	getWidthZ ()
double	getWidthZerr ()
void	initialize (const edm::ParameterSet &iConfig, edm::ConsumesCollector &iColl)
bool	IsFitPerBunchCrossing ()
	PVFitter ()
	PVFitter (const edm::ParameterSet &iConfig, edm::ConsumesCollector &&iColl)
	PVFitter (const edm::ParameterSet &iConfig, edm::ConsumesCollector &iColl)
double	pvQuality (const reco::Vertex &pv) const
	vertex quality measure More...
double	pvQuality (const BeamSpotFitPVData &pv) const
	vertex quality measure More...
void	readEvent (const edm::Event &iEvent)
void	resetAll ()
void	resetLSRange ()
void	resetRefTime ()
void	resizepvStore (unsigned int rmSize)
bool	runBXFitter ()
bool	runFitter ()
void	setFitLSRange (int ls0, int ls1)
void	setRefTime (std::time_t t0, std::time_t t1)
void	setTree (TTree *tree)
virtual	~PVFitter ()

Private Attributes
std::map< int, std::vector< BeamSpotFitPVData > >	bxMap_
bool	debug_
bool	do3DFit_
double	dynamicQualityCut_
double	errorScale_
std::ofstream	fasciiFile
reco::BeamSpot	fbeamspot
int	fbeginLumiOfFit
std::map< int, reco::BeamSpot >	fbspotMap
int	fendLumiOfFit
bool	fFitPerBunchCrossing
std::time_t	freftime [2]
TTree *	ftree_
double	fwidthX
double	fwidthXerr
double	fwidthY
double	fwidthYerr
double	fwidthZ
double	fwidthZerr
TH2F *	hPVx
TH2F *	hPVy
unsigned int	maxNrVertices_
double	maxVtxNormChi2_
double	maxVtxR_
double	maxVtxZ_
unsigned int	minNrVertices_
double	minSumPt_
double	minVtxNdf_
unsigned int	minVtxTracks_
double	minVtxWgt_
std::map< int, int >	npvsmap_
std::string	outputTxt_
std::vector< double >	pvQualities_
std::vector< BeamSpotFitPVData >	pvStore_
double	sigmaCut_
BeamSpotTreeData	theBeamSpotTreeData_
bool	useOnlyFirstPV_
edm::EDGetTokenT< reco::VertexCollection >	vertexToken_

Detailed Description

Definition at line 43 of file PVFitter.h.

Constructor & Destructor Documentation

PVFitter::PVFitter ( )

inline

Definition at line 45 of file PVFitter.h.

References iEvent, initialize(), and d0_phi_analyzer_cff::PVFitter.

{}

PVFitter::PVFitter	(	const edm::ParameterSet &	iConfig,
		edm::ConsumesCollector &&	iColl
	)

Definition at line 46 of file PVFitter.cc.

References initialize().

  : ftree_(nullptr)
{
  initialize(iConfig, iColl);
}

PVFitter::PVFitter	(	const edm::ParameterSet &	iConfig,
		edm::ConsumesCollector &	iColl
	)

Definition at line 53 of file PVFitter.cc.

References initialize().

    :ftree_(nullptr)
{
  initialize(iConfig, iColl);
}

PVFitter::~PVFitter ( )

virtual

Definition at line 94 of file PVFitter.cc.

                    {

}

Member Function Documentation

void PVFitter::compressStore

(

)

reduce size of primary vertex cache by increasing quality limit

Definition at line 486 of file PVFitter.cc.

References dynamicQualityCut_, mps_fire::i, pvQualities_, pvQuality(), and pvStore_.

Referenced by readEvent().

{
  //
  // fill vertex qualities
  //
  pvQualities_.resize(pvStore_.size());
  for ( unsigned int i=0; i<pvStore_.size(); ++i )  pvQualities_[i] = pvQuality(pvStore_[i]);
  sort(pvQualities_.begin(),pvQualities_.end());
  //
  // Set new quality cut to median. This cut will be used to reduce the
  // number of vertices in the store and also apply to all new vertices
  // until the next reset
  //
  dynamicQualityCut_ = pvQualities_[pvQualities_.size()/2];
  //
  // remove all vertices failing the cut from the store
  //   (to be moved to a more efficient memory management!)
  //
  unsigned int iwrite(0);
  for ( unsigned int i=0; i<pvStore_.size(); ++i ) {
    if ( pvQuality(pvStore_[i])>dynamicQualityCut_ )  continue;
    if ( i!=iwrite )  pvStore_[iwrite] = pvStore_[i];
    ++iwrite;
  }
  pvStore_.resize(iwrite);
  edm::LogInfo("PVFitter") << "Reduced primary vertex store size to "
                           << pvStore_.size() << " ; new dynamic quality cut = "
                           << dynamicQualityCut_ << std::endl;

}

void PVFitter::dumpTxtFile

(

)

Definition at line 480 of file PVFitter.cc.

                          {

}

void PVFitter::FitPerBunchCrossing ( )

inline

Definition at line 63 of file PVFitter.h.

{ fFitPerBunchCrossing = true; }

reco::BeamSpot PVFitter::getBeamSpot ( )

inline

Definition at line 91 of file PVFitter.h.

Referenced by AlcaBeamMonitor::endLuminosityBlock(), and BeamFitter::runPVandTrkFitter().

{ return fbeamspot; }

std::map<int, reco::BeamSpot> PVFitter::getBeamSpotMap ( )

inline

Definition at line 92 of file PVFitter.h.

Referenced by BeamFitter::runPVandTrkFitter().

{ return fbspotMap; }

int* PVFitter::getFitLSRange ( )

inline

Definition at line 94 of file PVFitter.h.

References tmp.

                       {
    int *tmp=new int[2];
    tmp[0] = fbeginLumiOfFit;
    tmp[1] = fendLumiOfFit;
    return tmp;
  }

int PVFitter::getNPVs ( )

inline

Definition at line 120 of file PVFitter.h.

{ return pvStore_.size(); }

const std::map<int, int>& PVFitter::getNPVsperBX ( )

inline

Definition at line 122 of file PVFitter.h.

References genParticles_cff::map, and findQualityFiles::size.

                                         {
    
    npvsmap_.clear();

    for ( std::map<int,std::vector<BeamSpotFitPVData> >::const_iterator pvStore = bxMap_.begin(); 
      pvStore!=bxMap_.end(); ++pvStore) {

      npvsmap_[ pvStore->first ] = (pvStore->second).size();

    }
    return npvsmap_;
  }

std::vector<BeamSpotFitPVData> PVFitter::getpvStore ( )

inline

Definition at line 61 of file PVFitter.h.

{ return pvStore_; } 

time_t* PVFitter::getRefTime ( )

inline

Definition at line 101 of file PVFitter.h.

                     {
   time_t *tmptime=new time_t[2];
   tmptime[0]=freftime[0];
   tmptime[1]=freftime[1];
   return tmptime;
  }

double PVFitter::getWidthX ( )

inline

Definition at line 54 of file PVFitter.h.

{ return fwidthX; }

double PVFitter::getWidthXerr ( )

inline

Definition at line 57 of file PVFitter.h.

Referenced by BeamFitter::runPVandTrkFitter().

{ return fwidthXerr; }

double PVFitter::getWidthY ( )

inline

Definition at line 55 of file PVFitter.h.

{ return fwidthY; }

double PVFitter::getWidthYerr ( )

inline

Definition at line 58 of file PVFitter.h.

{ return fwidthYerr; }

double PVFitter::getWidthZ ( )

inline

Definition at line 56 of file PVFitter.h.

{ return fwidthZ; }

double PVFitter::getWidthZerr ( )

inline

Definition at line 59 of file PVFitter.h.

{ return fwidthZerr; }

void PVFitter::initialize	(	const edm::ParameterSet &	iConfig,
		edm::ConsumesCollector &	iColl
	)

Definition at line 60 of file PVFitter.cc.

References edm::ConsumesCollector::consumes(), debug_, do3DFit_, dynamicQualityCut_, errorScale_, fFitPerBunchCrossing, edm::ParameterSet::getParameter(), hPVx, hPVy, maxNrVertices_, maxVtxNormChi2_, maxVtxR_, maxVtxZ_, minNrVertices_, minSumPt_, minVtxNdf_, minVtxTracks_, minVtxWgt_, sigmaCut_, useOnlyFirstPV_, and vertexToken_.

Referenced by PVFitter().

{
  //In order to make fitting ROOT histograms thread safe
  // one must call this undocumented function
  TMinuitMinimizer::UseStaticMinuit(false);
  debug_             = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<bool>("Debug");
  vertexToken_       = iColl.consumes<reco::VertexCollection>(
      iConfig.getParameter<edm::ParameterSet>("PVFitter")
      .getUntrackedParameter<edm::InputTag>("VertexCollection", edm::InputTag("offlinePrimaryVertices")));
  do3DFit_           = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<bool>("Apply3DFit");
  //writeTxt_          = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<bool>("WriteAscii");
  //outputTxt_         = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<std::string>("AsciiFileName");
  maxNrVertices_     = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<unsigned int>("maxNrStoredVertices");
  minNrVertices_     = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<unsigned int>("minNrVerticesForFit");
  minVtxNdf_         = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<double>("minVertexNdf");
  maxVtxNormChi2_    = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<double>("maxVertexNormChi2");
  minVtxTracks_      = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<unsigned int>("minVertexNTracks");
  minVtxWgt_         = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<double>("minVertexMeanWeight");
  maxVtxR_           = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<double>("maxVertexR");
  maxVtxZ_           = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<double>("maxVertexZ");
  errorScale_        = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<double>("errorScale");
  sigmaCut_          = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<double>("nSigmaCut");
  fFitPerBunchCrossing=iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<bool>("FitPerBunchCrossing");
  useOnlyFirstPV_    = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<bool>("useOnlyFirstPV");
  minSumPt_          = iConfig.getParameter<edm::ParameterSet>("PVFitter").getUntrackedParameter<double>("minSumPt");
  
  // preset quality cut to "infinite"
  dynamicQualityCut_ = 1.e30;

  hPVx = new TH2F("hPVx","PVx vs PVz distribution",200,-maxVtxR_, maxVtxR_, 200, -maxVtxZ_, maxVtxZ_);
  hPVy = new TH2F("hPVy","PVy vs PVz distribution",200,-maxVtxR_, maxVtxR_, 200, -maxVtxZ_, maxVtxZ_);
}

bool PVFitter::IsFitPerBunchCrossing ( )

inline

Definition at line 93 of file PVFitter.h.

Referenced by BeamFitter::dumpTxtFile(), and BeamFitter::runPVandTrkFitter().

{ return fFitPerBunchCrossing; }

double PVFitter::pvQuality

(

const reco::Vertex &

pv

)

const

vertex quality measure

Definition at line 518 of file PVFitter.cc.

References reco::Vertex::covariance().

Referenced by compressStore(), and readEvent().

{
  //
  // determinant of the transverse part of the PV covariance matrix
  //
  return
    pv.covariance(0,0)*pv.covariance(1,1)-
    pv.covariance(0,1)*pv.covariance(0,1);
}

double PVFitter::pvQuality

(

const BeamSpotFitPVData &

pv

)

const

vertex quality measure

Definition at line 529 of file PVFitter.cc.

References BeamSpotFitPVData::posCorr, and BeamSpotFitPVData::posError.

{
  //
  // determinant of the transverse part of the PV covariance matrix
  //
  double ex = pv.posError[0];
  double ey = pv.posError[1];
  return ex*ex*ey*ey*(1-pv.posCorr[0]*pv.posCorr[0]);
}

void PVFitter::readEvent

(

const edm::Event &

iEvent

)

Definition at line 99 of file PVFitter.cc.

References BeamSpotFitPVData::bunchCrossing, BeamSpotTreeData::bunchCrossing(), edm::EventBase::bunchCrossing(), bxMap_, compressStore(), dynamicQualityCut_, fFitPerBunchCrossing, ftree_, edm::Event::getByToken(), hPVx, hPVy, edm::EventBase::id(), BeamSpotTreeData::lumi(), edm::EventBase::luminosityBlock(), maxNrVertices_, minSumPt_, minVtxNdf_, minVtxTracks_, minVtxWgt_, BeamSpotFitPVData::posCorr, BeamSpotFitPVData::posError, BeamSpotFitPVData::position, EnergyCorrector::pt, MetAnalyzer::pv(), BeamSpotTreeData::pvData(), pvQuality(), pvStore_, BeamSpotTreeData::run(), edm::EventID::run(), TtFullHadEvtBuilder_cfi::sumPt, theBeamSpotTreeData_, useOnlyFirstPV_, and vertexToken_.

Referenced by AlcaBeamMonitor::analyze(), and BeamFitter::readEvent().

{

  //------ Primary Vertices
  edm::Handle< reco::VertexCollection > PVCollection;
  bool hasPVs = false;

  if ( iEvent.getByToken(vertexToken_, PVCollection ) ) {
      hasPVs = true;
  }
  //------

  if ( hasPVs ) {

      for (reco::VertexCollection::const_iterator pv = PVCollection->begin(); pv != PVCollection->end(); ++pv ) {
          if (useOnlyFirstPV_){
            if (pv != PVCollection->begin()) break;
          }

          //--- vertex selection
          if ( pv->isFake() || pv->tracksSize()==0 )  continue;
          if ( pv->ndof() < minVtxNdf_ || (pv->ndof()+3.)/pv->tracksSize()<2*minVtxWgt_ )  continue;
          //---

          if (pv->tracksSize() < minVtxTracks_ ) continue;

          const auto& testTrack = pv->trackRefAt(0);
          if(testTrack.isNull() || !testTrack.isAvailable())
          {
              edm::LogInfo("") << "Track collection not found. Skipping cut on sumPt.";
          }
          else
          {
              double sumPt=0;
              for(auto iTrack = pv->tracks_begin(); iTrack != pv->tracks_end(); ++iTrack)
              {
                  const auto pt = (*iTrack)->pt();
                  sumPt += pt;
              }
              if (sumPt < minSumPt_) continue;
          }

          hPVx->Fill( pv->x(), pv->z() );
          hPVy->Fill( pv->y(), pv->z() );

          //
          // 3D fit section
          //
          // apply additional quality cut
          if ( pvQuality(*pv)>dynamicQualityCut_ )  continue;
          // if store exceeds max. size: reduce size and apply new quality cut
          if ( pvStore_.size()>=maxNrVertices_ ) {
             compressStore();
             if ( pvQuality(*pv)>dynamicQualityCut_ )  continue;
          }
          //
          // copy PV to store
          //
          int bx = iEvent.bunchCrossing();
          BeamSpotFitPVData pvData;
          pvData.bunchCrossing = bx;
          pvData.position[0] = pv->x();
          pvData.position[1] = pv->y();
          pvData.position[2] = pv->z();
          pvData.posError[0] = pv->xError();
          pvData.posError[1] = pv->yError();
          pvData.posError[2] = pv->zError();
          pvData.posCorr[0] = pv->covariance(0,1)/pv->xError()/pv->yError();
          pvData.posCorr[1] = pv->covariance(0,2)/pv->xError()/pv->zError();
          pvData.posCorr[2] = pv->covariance(1,2)/pv->yError()/pv->zError();
          pvStore_.push_back(pvData);

      if(ftree_ != nullptr){
        theBeamSpotTreeData_.run(iEvent.id().run());
        theBeamSpotTreeData_.lumi(iEvent.luminosityBlock());
        theBeamSpotTreeData_.bunchCrossing(bx);
        theBeamSpotTreeData_.pvData(pvData);
        ftree_->Fill();
      }

      if (fFitPerBunchCrossing) bxMap_[bx].push_back(pvData);

      }

  }

}

void PVFitter::resetAll ( )

inline

Definition at line 80 of file PVFitter.h.

References align::BeamSpot.

Referenced by BeamFitter::BeamFitter(), and AlcaBeamMonitor::endLuminosityBlock().

                  {
    resetLSRange();
    resetRefTime();
    pvStore_.clear();
    bxMap_.clear();
    dynamicQualityCut_ = 1.e30;
    hPVx->Reset();
    hPVy->Reset();
    fbeamspot = reco::BeamSpot();
    fbspotMap.clear();
  };

void PVFitter::resetLSRange ( )

inline

Definition at line 66 of file PVFitter.h.

{ fbeginLumiOfFit=fendLumiOfFit=-1; }

void PVFitter::resetRefTime ( )

inline

Definition at line 67 of file PVFitter.h.

{ freftime[0] = freftime[1] = 0; }

void PVFitter::resizepvStore ( unsigned int  rmSize )

inline

Definition at line 109 of file PVFitter.h.

References MetAnalyzer::pv().

                                         {
  pvStore_.erase(pvStore_.begin(), pvStore_.begin()+rmSize);
  }

bool PVFitter::runBXFitter

(

)

Definition at line 192 of file PVFitter.cc.

References align::BeamSpot, bxMap_, errorScale_, fbeamspot, fbspotMap, fcn(), fwidthX, fwidthXerr, fwidthY, fwidthYerr, fwidthZ, fwidthZerr, genParticles_cff::map, makeMuonMisalignmentScenario::matrix, minNrVertices_, funct::pow(), reco::BeamSpot::setBeamWidthX(), reco::BeamSpot::setBeamWidthY(), FcnBeamSpotFitPV::setLimits(), reco::BeamSpot::setType(), sigmaCut_, findQualityFiles::size, and reco::BeamSpot::Tracker.

Referenced by BeamFitter::runPVandTrkFitter().

                           {

  using namespace ROOT::Minuit2;
  edm::LogInfo("PVFitter") << " Number of bunch crossings: " << bxMap_.size() << std::endl;

  bool fit_ok = true;

  for ( std::map<int,std::vector<BeamSpotFitPVData> >::const_iterator pvStore = bxMap_.begin();
    pvStore!=bxMap_.end(); ++pvStore) {

    // first set null beam spot in case
    // fit fails
    fbspotMap[pvStore->first] = reco::BeamSpot();

    edm::LogInfo("PVFitter") << " Number of PVs collected for PVFitter: " << (pvStore->second).size() << " in bx: " << pvStore->first << std::endl;

    if ( (pvStore->second).size() <= minNrVertices_ ) {
        edm::LogWarning("PVFitter") << " not enough PVs, continue" << std::endl;
    fit_ok = false;
      continue;
    }

    edm::LogInfo("PVFitter") << "Calculating beam spot with PVs ..." << std::endl;

    //
    // LL function and fitter
    //
    FcnBeamSpotFitPV* fcn = new FcnBeamSpotFitPV(pvStore->second);
    //
    // fit parameters: positions, widths, x-y correlations, tilts in xz and yz
    //
    MnUserParameters upar;
    upar.Add("x"     , 0.   , 0.02  , -10., 10.);  // 0
    upar.Add("y"     , 0.   , 0.02  , -10., 10.);  // 1
    upar.Add("z"     , 0.   , 0.20  , -30., 30.);  // 2
    upar.Add("ex"    , 0.015, 0.01  , 0.  , 10.);  // 3
    upar.Add("corrxy", 0.   , 0.02  , -1. , 1. );  // 4
    upar.Add("ey"    , 0.015, 0.01  , 0.  , 10.);  // 5
    upar.Add("dxdz"  , 0.   , 0.0002, -0.1, 0.1);  // 6
    upar.Add("dydz"  , 0.   , 0.0002, -0.1, 0.1);  // 7
    upar.Add("ez"    , 1.   , 0.1   , 0.  , 30.);  // 8
    upar.Add("scale", errorScale_   , errorScale_/10.,
                      errorScale_/2., errorScale_*2.);      // 9
    MnMigrad migrad(*fcn, upar);

    //
    // first iteration without correlations
    //
    upar.Fix(4);
    upar.Fix(6);
    upar.Fix(7);
    upar.Fix(9);
    FunctionMinimum ierr = migrad(0,1.);
    if ( !ierr.IsValid() ) {
        edm::LogInfo("PVFitter") << "3D beam spot fit failed in 1st iteration" << std::endl;
    fit_ok = false;
      continue;
    }
    //
    // refit with harder selection on vertices
    //
    fcn->setLimits(upar.Value(0)-sigmaCut_*upar.Value(3),
           upar.Value(0)+sigmaCut_*upar.Value(3),
           upar.Value(1)-sigmaCut_*upar.Value(5),
           upar.Value(1)+sigmaCut_*upar.Value(5),
           upar.Value(2)-sigmaCut_*upar.Value(8),
           upar.Value(2)+sigmaCut_*upar.Value(8));
    ierr = migrad(0,1.);
    if ( !ierr.IsValid() ) {
      edm::LogInfo("PVFitter") << "3D beam spot fit failed in 2nd iteration" << std::endl;
      fit_ok = false;
      continue;
    }
    //
    // refit with correlations
    //
    upar.Release(4);
    upar.Release(6);
    upar.Release(7);
    ierr = migrad(0,1.);
    if ( !ierr.IsValid() ) {
        edm::LogInfo("PVFitter") << "3D beam spot fit failed in 3rd iteration" << std::endl;
    fit_ok = false;
      continue;
    }

    fwidthX = upar.Value(3);
    fwidthY = upar.Value(5);
    fwidthZ = upar.Value(8);
    fwidthXerr = upar.Error(3);
    fwidthYerr = upar.Error(5);
    fwidthZerr = upar.Error(8);

    reco::BeamSpot::CovarianceMatrix matrix;
    // need to get the full cov matrix
    matrix(0,0) = pow( upar.Error(0), 2);
    matrix(1,1) = pow( upar.Error(1), 2);
    matrix(2,2) = pow( upar.Error(2), 2);
    matrix(3,3) = fwidthZerr * fwidthZerr;
    matrix(4,4) = pow( upar.Error(6), 2);
    matrix(5,5) = pow( upar.Error(7), 2);
    matrix(6,6) = fwidthXerr * fwidthXerr;

    fbeamspot = reco::BeamSpot( reco::BeamSpot::Point(upar.Value(0),
                              upar.Value(1),
                              upar.Value(2) ),
                fwidthZ,
                upar.Value(6), upar.Value(7),
                fwidthX,
                matrix );
    fbeamspot.setBeamWidthX( fwidthX );
    fbeamspot.setBeamWidthY( fwidthY );
    fbeamspot.setType( reco::BeamSpot::Tracker );

    fbspotMap[pvStore->first] = fbeamspot;
    edm::LogInfo("PVFitter") << "3D PV fit done for this bunch crossing."<<std::endl;
    //delete fcn;
    fit_ok = fit_ok & true;
  }

  return fit_ok;
}

bool PVFitter::runFitter

(

)

Definition at line 316 of file PVFitter.cc.

References align::BeamSpot, do3DFit_, benchmark_cfg::errors, errorScale_, fftjetvertexadder_cfi::errX, fftjetvertexadder_cfi::errY, fftjetvertexadder_cfi::errZ, fbeamspot, fcn(), fwidthX, fwidthXerr, fwidthY, fwidthYerr, fwidthZ, fwidthZerr, hPVx, hPVy, edm::isNotFinite(), makeMuonMisalignmentScenario::matrix, minNrVertices_, funct::pow(), pvStore_, reco::BeamSpot::setBeamWidthX(), reco::BeamSpot::setBeamWidthY(), reco::BeamSpot::setType(), sigmaCut_, str, AlCaHLTBitMon_QueryRunRegistry::string, and reco::BeamSpot::Tracker.

Referenced by AlcaBeamMonitor::endLuminosityBlock(), and BeamFitter::runPVandTrkFitter().

                         {

    using namespace ROOT::Minuit2;
    edm::LogInfo("PVFitter") << " Number of PVs collected for PVFitter: " << pvStore_.size() << std::endl;

    if ( pvStore_.size() <= minNrVertices_ ) return false;

    //need to create a unique histogram name to avoid ROOT trying to re-use one
    // also tell ROOT to hide its global state
    TDirectory::TContext guard{nullptr};
    std::ostringstream str;
    str <<this;
    std::unique_ptr<TH1D> h1PVx{ hPVx->ProjectionX( (std::string("h1PVx")+str.str()).c_str(), 0, -1, "e") };
    std::unique_ptr<TH1D> h1PVy{ hPVy->ProjectionX( (std::string("h1PVy")+str.str()).c_str(), 0, -1, "e") };
    std::unique_ptr<TH1D> h1PVz{ hPVx->ProjectionY( (std::string("h1PVz")+str.str()).c_str(), 0, -1, "e") };

    //Use our own copy for thread safety
    // also do not add to global list of functions
    TF1 gausx("localGausX","gaus",0.,1.,TF1::EAddToList::kNo);
    TF1 gausy("localGausY","gaus",0.,1.,TF1::EAddToList::kNo);
    TF1 gausz("localGausZ","gaus",0.,1.,TF1::EAddToList::kNo);

    h1PVx->Fit(&gausx,"QLMN0 SERIAL");
    h1PVy->Fit(&gausy,"QLMN0 SERIAL");
    h1PVz->Fit(&gausz,"QLMN0 SERIAL");


    fwidthX     = gausx.GetParameter(2);
    fwidthY     = gausy.GetParameter(2);
    fwidthZ     = gausz.GetParameter(2);
    fwidthXerr  = gausx.GetParError(2);
    fwidthYerr  = gausy.GetParError(2);
    fwidthZerr  = gausz.GetParError(2);
    
    double estX = gausx.GetParameter(1);
    double estY = gausy.GetParameter(1); 
    double estZ = gausz.GetParameter(1);
    double errX = fwidthX*3.;
    double errY = fwidthY*3.; 
    double errZ = fwidthZ*3.;

    if ( ! do3DFit_ ) {

      reco::BeamSpot::CovarianceMatrix matrix;
      matrix(2,2) = gausz.GetParError(1) * gausz.GetParError(1);
      matrix(3,3) = fwidthZerr * fwidthZerr;
      matrix(6,6) = fwidthXerr * fwidthXerr;

      fbeamspot = reco::BeamSpot( reco::BeamSpot::Point(gausx.GetParameter(1),
                                                        gausy.GetParameter(1),
                                                        gausz.GetParameter(1) ),
                                  fwidthZ,
                                  0., 0.,
                                  fwidthX,
                                  matrix );
      fbeamspot.setBeamWidthX( fwidthX );
      fbeamspot.setBeamWidthY( fwidthY );
      fbeamspot.setType(reco::BeamSpot::Tracker);

    }
    else { // do 3D fit
      //
      // LL function and fitter
      //
      FcnBeamSpotFitPV* fcn = new FcnBeamSpotFitPV(pvStore_);
      //
      // fit parameters: positions, widths, x-y correlations, tilts in xz and yz
      //
      MnUserParameters upar;
      upar.Add("x"     , estX       , errX       , -10.     , 10.       ); // 0
      upar.Add("y"     , estY       , errY       , -10.     , 10.       ); // 1
      upar.Add("z"     , estZ       , errZ       , -30.     , 30.       ); // 2
      upar.Add("ex"    , 0.015      , 0.01       , 0.       , 10.       ); // 3
      upar.Add("corrxy", 0.         , 0.02       , -1.      , 1.        ); // 4
      upar.Add("ey"    , 0.015      , 0.01       , 0.       , 10.       ); // 5
      upar.Add("dxdz"  , 0.         , 0.0002     , -0.1     , 0.1       ); // 6
      upar.Add("dydz"  , 0.         , 0.0002     , -0.1     , 0.1       ); // 7
      upar.Add("ez"    , 1.         , 0.1        , 0.       , 30.       ); // 8
      upar.Add("scale" , errorScale_, errorScale_/10.,errorScale_/2., errorScale_*2.); // 9  
      MnMigrad migrad(*fcn, upar);
      //
      // first iteration without correlations
      //
      migrad.Fix(4);
      migrad.Fix(6);
      migrad.Fix(7);
      migrad.Fix(9);
      FunctionMinimum ierr = migrad(0,1.);
      if ( !ierr.IsValid() ) {
          edm::LogWarning("PVFitter") << "3D beam spot fit failed in 1st iteration" << std::endl;
          return false;
      }
      //
      // refit with harder selection on vertices
      //

      vector<double> results ;
      vector<double> errors  ;
      results = ierr.UserParameters().Params() ;                           \
      errors  = ierr.UserParameters().Errors() ;                           \

      
      fcn->setLimits(results[0]-sigmaCut_*results[3],
                     results[0]+sigmaCut_*results[3],
                     results[1]-sigmaCut_*results[5],
                     results[1]+sigmaCut_*results[5],
                     results[2]-sigmaCut_*results[8],
                     results[2]+sigmaCut_*results[8]);
      ierr = migrad(0,1.);
      if ( !ierr.IsValid() ) {
          edm::LogWarning("PVFitter") << "3D beam spot fit failed in 2nd iteration" << std::endl;
          return false;
      }
      //
      // refit with correlations
      //
      migrad.Release(4);
      migrad.Release(6);
      migrad.Release(7);
      ierr = migrad(0,1.);
      if ( !ierr.IsValid() ) {
          edm::LogWarning("PVFitter") << "3D beam spot fit failed in 3rd iteration" << std::endl;
          return false;
      }

      results = ierr.UserParameters().Params() ;                           \
      errors  = ierr.UserParameters().Errors() ;                           \

      fwidthX = results[3];
      fwidthY = results[5];
      fwidthZ = results[8];
      fwidthXerr = errors[3];
      fwidthYerr = errors[5];
      fwidthZerr = errors[8];

      // check errors on widths and sigmaZ for nan
      if ( edm::isNotFinite(fwidthXerr) || edm::isNotFinite(fwidthYerr) || edm::isNotFinite(fwidthZerr) ) {
          edm::LogWarning("PVFitter") << "3D beam spot fit returns nan in 3rd iteration" << std::endl;
          return false;
      }

      reco::BeamSpot::CovarianceMatrix matrix;
      // need to get the full cov matrix
      matrix(0,0) = pow( errors[0], 2);
      matrix(1,1) = pow( errors[1], 2);
      matrix(2,2) = pow( errors[2], 2);
      matrix(3,3) = fwidthZerr * fwidthZerr;
      matrix(6,6) = fwidthXerr * fwidthXerr;

      fbeamspot = reco::BeamSpot( reco::BeamSpot::Point(results[0],
                                                        results[1],
                                                        results[2] ),
                                  fwidthZ,
                                  results[6], results[7],
                                  fwidthX,
                                  matrix );
      fbeamspot.setBeamWidthX( fwidthX );
      fbeamspot.setBeamWidthY( fwidthY );
      fbeamspot.setType(reco::BeamSpot::Tracker); 
    }

    return true;
}

void PVFitter::setFitLSRange ( int  ls0, int  ls1  )

inline

Definition at line 73 of file PVFitter.h.

                                       {
    fbeginLumiOfFit = ls0;
    fendLumiOfFit = ls1;
  }

void PVFitter::setRefTime ( std::time_t  t0, std::time_t  t1  )

inline

Definition at line 69 of file PVFitter.h.

References genVertex_cff::t0.

                                              {
    freftime[0] = t0;
    freftime[1] = t1;
  }

void PVFitter::setTree

(

TTree *

tree

)

Definition at line 187 of file PVFitter.cc.

References BeamSpotTreeData::branch(), ftree_, theBeamSpotTreeData_, and compare::tree.

Referenced by BeamFitter::BeamFitter().

                                 {
  ftree_ = tree;
  theBeamSpotTreeData_.branch(ftree_);
}

Member Data Documentation

std::map< int, std::vector<BeamSpotFitPVData> > PVFitter::bxMap_

private

Definition at line 179 of file PVFitter.h.

Referenced by readEvent(), and runBXFitter().

bool PVFitter::debug_

private

Definition at line 145 of file PVFitter.h.

Referenced by initialize().

bool PVFitter::do3DFit_

private

Definition at line 146 of file PVFitter.h.

Referenced by initialize(), and runFitter().

double PVFitter::dynamicQualityCut_

private

Definition at line 180 of file PVFitter.h.

Referenced by compressStore(), initialize(), and readEvent().

double PVFitter::errorScale_

private

Definition at line 158 of file PVFitter.h.

Referenced by initialize(), runBXFitter(), and runFitter().

std::ofstream PVFitter::fasciiFile

private

Definition at line 143 of file PVFitter.h.

reco::BeamSpot PVFitter::fbeamspot

private

Definition at line 138 of file PVFitter.h.

Referenced by runBXFitter(), and runFitter().

int PVFitter::fbeginLumiOfFit

private

Definition at line 169 of file PVFitter.h.

std::map<int,reco::BeamSpot> PVFitter::fbspotMap

private

Definition at line 139 of file PVFitter.h.

Referenced by runBXFitter().

int PVFitter::fendLumiOfFit

private

Definition at line 170 of file PVFitter.h.

bool PVFitter::fFitPerBunchCrossing

private

Definition at line 140 of file PVFitter.h.

Referenced by initialize(), and readEvent().

std::time_t PVFitter::freftime[2]

private

Definition at line 162 of file PVFitter.h.

TTree* PVFitter::ftree_

private

Definition at line 166 of file PVFitter.h.

Referenced by readEvent(), and setTree().

double PVFitter::fwidthX

private

Definition at line 171 of file PVFitter.h.

Referenced by runBXFitter(), and runFitter().

double PVFitter::fwidthXerr

private

Definition at line 174 of file PVFitter.h.

Referenced by runBXFitter(), and runFitter().

double PVFitter::fwidthY

private

Definition at line 172 of file PVFitter.h.

Referenced by runBXFitter(), and runFitter().

double PVFitter::fwidthYerr

private

Definition at line 175 of file PVFitter.h.

Referenced by runBXFitter(), and runFitter().

double PVFitter::fwidthZ

private

Definition at line 173 of file PVFitter.h.

Referenced by runBXFitter(), and runFitter().

double PVFitter::fwidthZerr

private

Definition at line 176 of file PVFitter.h.

Referenced by runBXFitter(), and runFitter().

TH2F* PVFitter::hPVx

private

Definition at line 164 of file PVFitter.h.

Referenced by initialize(), readEvent(), and runFitter().

TH2F* PVFitter::hPVy

private

Definition at line 164 of file PVFitter.h.

Referenced by initialize(), readEvent(), and runFitter().

unsigned int PVFitter::maxNrVertices_

private

Definition at line 150 of file PVFitter.h.

Referenced by initialize(), and readEvent().

double PVFitter::maxVtxNormChi2_

private

Definition at line 153 of file PVFitter.h.

Referenced by initialize().

double PVFitter::maxVtxR_

private

Definition at line 156 of file PVFitter.h.

Referenced by initialize().

double PVFitter::maxVtxZ_

private

Definition at line 157 of file PVFitter.h.

Referenced by initialize().

unsigned int PVFitter::minNrVertices_

private

Definition at line 151 of file PVFitter.h.

Referenced by initialize(), runBXFitter(), and runFitter().

double PVFitter::minSumPt_

private

Definition at line 160 of file PVFitter.h.

Referenced by initialize(), and readEvent().

double PVFitter::minVtxNdf_

private

Definition at line 152 of file PVFitter.h.

Referenced by initialize(), and readEvent().

unsigned int PVFitter::minVtxTracks_

private

Definition at line 154 of file PVFitter.h.

Referenced by initialize(), and readEvent().

double PVFitter::minVtxWgt_

private

Definition at line 155 of file PVFitter.h.

Referenced by initialize(), and readEvent().

std::map<int, int> PVFitter::npvsmap_

private

Definition at line 137 of file PVFitter.h.

std::string PVFitter::outputTxt_

private

Definition at line 148 of file PVFitter.h.

std::vector<double> PVFitter::pvQualities_

private

Definition at line 181 of file PVFitter.h.

Referenced by compressStore().

std::vector<BeamSpotFitPVData> PVFitter::pvStore_

private

Definition at line 178 of file PVFitter.h.

Referenced by compressStore(), readEvent(), and runFitter().

double PVFitter::sigmaCut_

private

Definition at line 159 of file PVFitter.h.

Referenced by initialize(), runBXFitter(), and runFitter().

BeamSpotTreeData PVFitter::theBeamSpotTreeData_

private

Definition at line 183 of file PVFitter.h.

Referenced by readEvent(), and setTree().

bool PVFitter::useOnlyFirstPV_

private

Definition at line 141 of file PVFitter.h.

Referenced by initialize(), and readEvent().

edm::EDGetTokenT<reco::VertexCollection> PVFitter::vertexToken_

private

Definition at line 147 of file PVFitter.h.

Referenced by initialize(), and readEvent().