l1tVertexFinder::VertexFinder Class Reference

#include <VertexFinder.h>

Classes
struct	SortTracksByPt
struct	SortTracksByZ0
	Helper structs/classes. More...

Public Member Functions
void	adaptiveVertexReconstruction ()
	Adaptive Vertex Reconstruction algorithm. More...
void	AdaptiveVertexReconstruction ()
	Vertexing algorithms. More...
void	agglomerativeHierarchicalClustering ()
	Simple Merge Algorithm. More...
void	AgglomerativeHierarchicalClustering ()
	Simple Merge Algorithm. More...
void	associatePrimaryVertex (double trueZ0)
	Associate the primary vertex with the real one. More...
float	centralDistance (RecoVertex<> cluster0, RecoVertex<> cluster1)
	Find distance between centres of two clusters. More...
float	CentralDistance (RecoVertex<> cluster0, RecoVertex<> cluster1)
	Find distance between centres of two clusters. More...
void	computeAndSetVertexParameters (RecoVertex<> &vertex, const std::vector< float > &bin_centers, const std::vector< unsigned int > &counts)
	Compute the vertex parameters. More...
void	DBSCAN ()
	DBSCAN algorithm. More...
void	fastHisto (const TrackerTopology *tTopo)
	Histogramming algorithm. More...
void	FastHisto (const TrackerTopology *tTopo)
	Histogramming algorithm. More...
void	fastHistoLooseAssociation ()
	High pT Vertex Algorithm. More...
void	FastHistoLooseAssociation ()
	TDR histogramming algorithmn. More...
void	findPrimaryVertex ()
	Find the primary vertex. More...
const FitTrackCollection &	fitTracks () const
	Storage for tracks out of the L1 Track finder. More...
void	GapClustering ()
	Gap Clustering Algorithm. More...
void	HPV ()
	High pT Vertex Algorithm. More...
unsigned int	IterationsPerTrack () const
	Accessors. More...
unsigned int	iterationsPerTrack () const
	Number of iterations. More...
void	Kmeans ()
	Kmeans Algorithm. More...
float	maxDistance (RecoVertex<> cluster0, RecoVertex<> cluster1)
	Find maximum distance in two clusters of tracks. More...
float	MaxDistance (RecoVertex<> cluster0, RecoVertex<> cluster1)
	Find maximum distance in two clusters of tracks. More...
float	meanDistance (RecoVertex<> cluster0, RecoVertex<> cluster1)
	Find average distance in two clusters of tracks. More...
float	MeanDistance (RecoVertex<> cluster0, RecoVertex<> cluster1)
	Find average distance in two clusters of tracks. More...
float	minDistance (RecoVertex<> cluster0, RecoVertex<> cluster1)
	Find minimum distance in two clusters of tracks. More...
float	MinDistance (RecoVertex<> cluster0, RecoVertex<> cluster1)
	Find minimum distance in two clusters of tracks. More...
unsigned int	numInputTracks () const
	Storage for tracks out of the L1 Track finder. More...
unsigned int	NumIterations () const
	Number of iterations. More...
unsigned int	numIterations () const
	Number of iterations. More...
unsigned int	numVertices () const
	Number of reconstructed vertices. More...
RecoVertex	primaryVertex () const
	Reconstructed Primary Vertex. More...
unsigned int	primaryVertexId () const
	Reconstructed Primary Vertex Id. More...
void	PVR ()
	Principal Vertex Reconstructor algorithm. More...
void	SortVerticesInPt ()
	Sort vertices in pT. More...
void	SortVerticesInZ0 ()
	Sort vertices in z. More...
template<typename ForwardIterator , typename T >
void	strided_iota (ForwardIterator first, ForwardIterator last, T value, T stride)
	VertexFinder (FitTrackCollection &fitTracks, const AlgoSettings &settings)
	Constructor and destructor. More...
const std::vector< RecoVertex<> > &	vertices () const
	Returns the z positions of the reconstructed primary vertices. More...
	~VertexFinder ()

Private Attributes
FitTrackCollection	fitTracks_
unsigned int	iterations_
unsigned int	numMatchedVertices_
unsigned int	pv_index_
const AlgoSettings *	settings_
std::vector< RecoVertex<> >	vertices_

Detailed Description

Definition at line 21 of file VertexFinder.h.

Constructor & Destructor Documentation

VertexFinder()

l1tVertexFinder::VertexFinder::VertexFinder ( FitTrackCollection &  fitTracks, const AlgoSettings &  settings  )

inline

Constructor and destructor.

Definition at line 24 of file VertexFinder.h.

                                                                              {
      fitTracks_ = fitTracks;
      settings_ = &settings;
    }

References fitTracks(), fitTracks_, and settings_.

~VertexFinder()

l1tVertexFinder::VertexFinder::~VertexFinder ( )

inline

Definition at line 28 of file VertexFinder.h.

{}

Member Function Documentation

adaptiveVertexReconstruction()

void l1tVertexFinder::VertexFinder::adaptiveVertexReconstruction

(

)

Adaptive Vertex Reconstruction algorithm.

Definition at line 306 of file VertexFinder.cc.

                                                  {
    bool start = true;
    iterations_ = 0;
    FitTrackCollection discardedTracks, acceptedTracks, discardedTracks2;
 
    for (const L1Track& track : fitTracks_) {
      discardedTracks.push_back(track);
    }
 
    while (discardedTracks.size() >= settings_->vx_minTracks() or start == true) {
      start = false;
      discardedTracks2.clear();
      FitTrackCollection::iterator it = discardedTracks.begin();
      const L1Track track = *it;
      acceptedTracks.push_back(track);
      float z0sum = track.z0();
 
      for (FitTrackCollection::iterator it2 = discardedTracks.begin(); it2 < discardedTracks.end(); ++it2) {
        if (it2 != it) {
          const L1Track secondTrack = *it2;
          // Calculate new vertex z0 adding this track
          z0sum += secondTrack.z0();
          float z0vertex = z0sum / (acceptedTracks.size() + 1);
          // Calculate chi2 of new vertex
          float chi2 = 0.;
          float dof = 0.;
          for (const L1Track& accTrack : acceptedTracks) {
            iterations_++;
            float Residual = accTrack.z0() - z0vertex;
            if (std::abs(accTrack.eta()) < 1.2)
              Residual /= 0.1812;  // Assumed z0 resolution
            else if (std::abs(accTrack.eta()) >= 1.2 && std::abs(accTrack.eta()) < 1.6)
              Residual /= 0.2912;
            else if (std::abs(accTrack.eta()) >= 1.6 && std::abs(accTrack.eta()) < 2.)
              Residual /= 0.4628;
            else
              Residual /= 0.65;
 
            chi2 += Residual * Residual;
            dof = (acceptedTracks.size() + 1) * 2 - 1;
          }
          if (chi2 / dof < settings_->vx_chi2cut()) {
            acceptedTracks.push_back(secondTrack);
          } else {
            discardedTracks2.push_back(secondTrack);
            z0sum -= secondTrack.z0();
          }
        }
      }
 
      if (acceptedTracks.size() >= settings_->vx_minTracks()) {
        RecoVertex vertex;
        for (const L1Track& track : acceptedTracks) {
          vertex.insert(&track);
        }
        computeAndSetVertexParameters(vertex, {}, {});
        vertices_.push_back(vertex);
      }
 
      acceptedTracks.clear();
      discardedTracks.clear();
      discardedTracks = discardedTracks2;
    }
  }

References funct::abs(), hltPixelTracks_cff::chi2, or, HLT_FULL_cff::track, bphysicsOniaDQM_cfi::vertex, and l1tVertexFinder::L1Track::z0().

Referenced by VertexProducer::produce().

AdaptiveVertexReconstruction()

void l1tVertexFinder::VertexFinder::AdaptiveVertexReconstruction

(

)

Vertexing algorithms.

Adaptive Vertex Reconstruction algorithm

agglomerativeHierarchicalClustering()

void l1tVertexFinder::VertexFinder::agglomerativeHierarchicalClustering

(

)

Simple Merge Algorithm.

Definition at line 124 of file VertexFinder.cc.

                                                         {
    iterations_ = 0;
 
    sort(fitTracks_.begin(), fitTracks_.end(), SortTracksByZ0());
 
    std::vector<RecoVertex<>> vClusters;
    vClusters.resize(fitTracks_.size());
 
    for (unsigned int i = 0; i < fitTracks_.size(); ++i) {
      vClusters[i].insert(&fitTracks_[i]);
      // iterations_++;
    }
 
    while (true) {
      float MinimumScore = 9999;
 
      unsigned int clusterId0 = 0;
      unsigned int clusterId1 = 0;
      for (unsigned int iClust = 0; iClust < vClusters.size() - 1; iClust++) {
        iterations_++;
 
        float M = 0;
        if (settings_->vx_distanceType() == 0)
          M = maxDistance(vClusters[iClust], vClusters[iClust + 1]);
        else if (settings_->vx_distanceType() == 1)
          M = minDistance(vClusters[iClust], vClusters[iClust + 1]);
        else if (settings_->vx_distanceType() == 2)
          M = meanDistance(vClusters[iClust], vClusters[iClust + 1]);
        else
          M = centralDistance(vClusters[iClust], vClusters[iClust + 1]);
 
        if (M < MinimumScore) {
          MinimumScore = M;
          clusterId0 = iClust;
          clusterId1 = iClust + 1;
        }
      }
      if (MinimumScore > settings_->vx_distance() or vClusters[clusterId1].tracks().empty())
        break;
      for (const L1Track* track : vClusters[clusterId0].tracks()) {
        vClusters[clusterId1].insert(track);
      }
      vClusters.erase(vClusters.begin() + clusterId0);
    }
 
    for (RecoVertex clust : vClusters) {
      if (clust.numTracks() >= settings_->vx_minTracks()) {
        computeAndSetVertexParameters(clust, {}, {});
        vertices_.push_back(clust);
      }
    }
  }

References mps_fire::i, particleFlowClusterHGC_cfi::maxDistance, or, jetUpdater_cfi::sort, HLT_FULL_cff::track, and tracks.

Referenced by VertexProducer::produce().

AgglomerativeHierarchicalClustering()

void l1tVertexFinder::VertexFinder::AgglomerativeHierarchicalClustering

(

)

Simple Merge Algorithm.

associatePrimaryVertex()

void l1tVertexFinder::VertexFinder::associatePrimaryVertex

(

double

trueZ0

)

Associate the primary vertex with the real one.

Definition at line 452 of file VertexFinder.cc.

                                                         {
    double distance = 999.;
    for (unsigned int id = 0; id < vertices_.size(); ++id) {
      if (std::abs(trueZ0 - vertices_[id].z0()) < distance) {
        distance = std::abs(trueZ0 - vertices_[id].z0());
        pv_index_ = id;
      }
    }
  }

References funct::abs(), HLT_FULL_cff::distance, triggerObjects_cff::id, and HLTMuonOfflineAnalyzer_cfi::z0.

centralDistance()

float l1tVertexFinder::VertexFinder::centralDistance	(	RecoVertex<>	cluster0,
		RecoVertex<>	cluster1
	)

Find distance between centres of two clusters.

Definition at line 117 of file VertexFinder.cc.

                                                                                  {
    computeAndSetVertexParameters(cluster0, {}, {});
    computeAndSetVertexParameters(cluster1, {}, {});
    float distance = std::abs(cluster0.z0() - cluster1.z0());
    return distance;
  }

References funct::abs(), HLT_FULL_cff::distance, and l1tVertexFinder::RecoVertex< T >::z0().

CentralDistance()

float l1tVertexFinder::VertexFinder::CentralDistance	(	RecoVertex<>	cluster0,
		RecoVertex<>	cluster1
	)

Find distance between centres of two clusters.

computeAndSetVertexParameters()

void l1tVertexFinder::VertexFinder::computeAndSetVertexParameters	(	RecoVertex<> &	vertex,
		const std::vector< float > &	bin_centers,
		const std::vector< unsigned int > &	counts
	)

Compute the vertex parameters.

Definition at line 7 of file VertexFinder.cc.

                                                                                          {
    double pt = 0.;
    double z0 = 0.;
    double z0width = 0.;
    bool highPt = false;
    double highestPt = 0.;
    unsigned int numHighPtTracks = 0;
 
    float SumZ = 0.;
    float z0square = 0.;
    float trackPt = 0.;
 
    std::vector<double> bin_pt(bin_centers.size(), 0.0);
    unsigned int ibin = 0;
    unsigned int itrack = 0;
 
    for (const L1Track* track : vertex.tracks()) {
      itrack++;
      trackPt = track->pt();
      if (trackPt > settings_->vx_TrackMaxPt()) {
        highPt = true;
        numHighPtTracks++;
        highestPt = (trackPt > highestPt) ? trackPt : highestPt;
        if (settings_->vx_TrackMaxPtBehavior() == 0)
          continue;  // ignore this track
        else if (settings_->vx_TrackMaxPtBehavior() == 1)
          trackPt = settings_->vx_TrackMaxPt();  // saturate
      }
 
      pt += std::pow(trackPt, settings_->vx_weightedmean());
      if (bin_centers.empty() && counts.empty()) {
        SumZ += track->z0() * std::pow(trackPt, settings_->vx_weightedmean());
        z0square += track->z0() * track->z0();
      } else {
        bin_pt[ibin] += std::pow(trackPt, settings_->vx_weightedmean());
        if (itrack == counts[ibin]) {
          SumZ += bin_centers[ibin] * bin_pt[ibin];
          z0square += bin_centers[ibin] * bin_centers[ibin];
          itrack = 0;
          ibin++;
        }
      }
    }
 
    z0 = SumZ / ((settings_->vx_weightedmean() > 0) ? pt : vertex.numTracks());
    z0square /= vertex.numTracks();
    z0width = sqrt(std::abs(z0 * z0 - z0square));
 
    vertex.setParameters(pt, z0, z0width, highPt, numHighPtTracks, highestPt);
  }

References funct::abs(), dqmiodumpmetadata::counts, funct::pow(), DiDispStaMuonMonitor_cfi::pt, mathSSE::sqrt(), HLT_FULL_cff::track, listHistos::trackPt, bphysicsOniaDQM_cfi::vertex, and HLTMuonOfflineAnalyzer_cfi::z0.

DBSCAN()

void l1tVertexFinder::VertexFinder::DBSCAN

(

)

DBSCAN algorithm.

Definition at line 177 of file VertexFinder.cc.

                            {
    // std::vector<RecoVertex> vClusters;
    std::vector<unsigned int> visited;
    std::vector<unsigned int> saved;
 
    sort(fitTracks_.begin(), fitTracks_.end(), SortTracksByPt());
    iterations_ = 0;
 
    for (unsigned int i = 0; i < fitTracks_.size(); ++i) {
      if (find(visited.begin(), visited.end(), i) != visited.end())
        continue;
 
      // if(fitTracks_[i]->pt()>10.){
      visited.push_back(i);
      std::set<unsigned int> neighbourTrackIds;
      unsigned int numDensityTracks = 0;
      if (fitTracks_[i].pt() > settings_->vx_dbscan_pt())
        numDensityTracks++;
      else
        continue;
      for (unsigned int k = 0; k < fitTracks_.size(); ++k) {
        iterations_++;
        if (k != i and std::abs(fitTracks_[k].z0() - fitTracks_[i].z0()) < settings_->vx_distance()) {
          neighbourTrackIds.insert(k);
          if (fitTracks_[k].pt() > settings_->vx_dbscan_pt()) {
            numDensityTracks++;
          }
        }
      }
 
      if (numDensityTracks < settings_->vx_dbscan_mintracks()) {
        // mark track as noise
      } else {
        RecoVertex vertex;
        vertex.insert(&fitTracks_[i]);
        saved.push_back(i);
        for (unsigned int id : neighbourTrackIds) {
          if (find(visited.begin(), visited.end(), id) == visited.end()) {
            visited.push_back(id);
            std::vector<unsigned int> neighbourTrackIds2;
            for (unsigned int k = 0; k < fitTracks_.size(); ++k) {
              iterations_++;
              if (std::abs(fitTracks_[k].z0() - fitTracks_[id].z0()) < settings_->vx_distance()) {
                neighbourTrackIds2.push_back(k);
              }
            }
 
            // if (neighbourTrackIds2.size() >= settings_->vx_minTracks()) {
            for (unsigned int id2 : neighbourTrackIds2) {
              neighbourTrackIds.insert(id2);
            }
            // }
          }
          if (find(saved.begin(), saved.end(), id) == saved.end())
            vertex.insert(&fitTracks_[id]);
        }
        computeAndSetVertexParameters(vertex, {}, {});
        if (vertex.numTracks() >= settings_->vx_minTracks())
          vertices_.push_back(vertex);
      }
      // }
    }
  }

References funct::abs(), spr::find(), mps_fire::i, triggerObjects_cff::id, globals_cff::id2, dqmdumpme::k, DiDispStaMuonMonitor_cfi::pt, jetUpdater_cfi::sort, bphysicsOniaDQM_cfi::vertex, class-composition::visited, and HLTMuonOfflineAnalyzer_cfi::z0.

Referenced by VertexProducer::produce().

fastHisto()

void l1tVertexFinder::VertexFinder::fastHisto

(

const TrackerTopology *

tTopo

)

Histogramming algorithm.

Definition at line 486 of file VertexFinder.cc.

                                                           {
    // Create the histogram
    int nbins =
        std::ceil((settings_->vx_histogram_max() - settings_->vx_histogram_min()) / settings_->vx_histogram_binwidth());
    std::vector<RecoVertex<>> hist(nbins);
    std::vector<RecoVertex<>> sums(nbins - settings_->vx_windowSize());
    std::vector<float> bounds(nbins + 1);
    strided_iota(std::begin(bounds),
                 std::next(std::begin(bounds), nbins + 1),
                 settings_->vx_histogram_min(),
                 settings_->vx_histogram_binwidth());
 
    // Loop over the tracks and fill the histogram
    for (const L1Track& track : fitTracks_) {
      if ((track.z0() < settings_->vx_histogram_min()) || (track.z0() > settings_->vx_histogram_max()))
        continue;
      if (track.getTTTrackPtr()->chi2() > settings_->vx_TrackMaxChi2())
        continue;
      if (track.pt() < settings_->vx_TrackMinPt())
        continue;
 
      // Get the number of stubs and the number of stubs in PS layers
      float nPS = 0., nstubs = 0;
 
      // Get pointers to stubs associated to the L1 track
      const auto& theStubs = track.getTTTrackPtr()->getStubRefs();
      if (theStubs.empty()) {
        edm::LogWarning("VertexFinder") << "fastHisto::Could not retrieve the vector of stubs.";
        continue;
      }
 
      // Loop over the stubs
      for (const auto& stub : theStubs) {
        nstubs++;
        bool isPS = false;
        DetId detId(stub->getDetId());
        if (detId.det() == DetId::Detector::Tracker) {
          if (detId.subdetId() == StripSubdetector::TOB && tTopo->tobLayer(detId) <= 3)
            isPS = true;
          else if (detId.subdetId() == StripSubdetector::TID && tTopo->tidRing(detId) <= 9)
            isPS = true;
        }
        if (isPS)
          nPS++;
      }  // End loop over stubs
      if (nstubs < settings_->vx_NStubMin())
        continue;
      if (nPS < settings_->vx_NStubPSMin())
        continue;
 
      // Quality cuts, may need to be re-optimized
      int trk_nstub = (int)track.getTTTrackPtr()->getStubRefs().size();
      float chi2dof = track.getTTTrackPtr()->chi2() / (2 * trk_nstub - 4);
 
      if (settings_->vx_DoPtComp()) {
        float trk_consistency = track.getTTTrackPtr()->stubPtConsistency();
        if (trk_nstub == 4) {
          if (std::abs(track.eta()) < 2.2 && trk_consistency > 10)
            continue;
          else if (std::abs(track.eta()) > 2.2 && chi2dof > 5.0)
            continue;
        }
      }
      if (settings_->vx_DoTightChi2()) {
        if (track.pt() > 10.0 && chi2dof > 5.0)
          continue;
      }
 
      // Assign the track to the correct vertex
      auto upper_bound = std::lower_bound(bounds.begin(), bounds.end(), track.z0());
      int index = std::distance(bounds.begin(), upper_bound) - 1;
      hist.at(index).insert(&track);
    }  // end loop over tracks
 
    // Compute the sums
    // sliding windows ... sum_i_i+(w-1) where i in (0,nbins-w) and w is the window size
    std::vector<float> bin_centers(settings_->vx_windowSize(), 0.0);
    std::vector<unsigned int> counts(settings_->vx_windowSize(), 0);
    for (unsigned int i = 0; i < sums.size(); i++) {
      for (unsigned int j = 0; j < settings_->vx_windowSize(); j++) {
        bin_centers[j] = settings_->vx_histogram_min() + ((i + j) * settings_->vx_histogram_binwidth()) +
                         (0.5 * settings_->vx_histogram_binwidth());
        counts[j] = hist.at(i + j).numTracks();
        sums.at(i) += hist.at(i + j);
      }
      computeAndSetVertexParameters(sums.at(i), bin_centers, counts);
    }
 
    // Find the maxima of the sums
    float sigma_max = -999;
    int imax = -999;
    std::vector<int> found;
    found.reserve(settings_->vx_nvtx());
    for (unsigned int ivtx = 0; ivtx < settings_->vx_nvtx(); ivtx++) {
      sigma_max = -999;
      imax = -999;
      for (unsigned int i = 0; i < sums.size(); i++) {
        // Skip this window if it will already be returned
        if (find(found.begin(), found.end(), i) != found.end())
          continue;
        if (sums.at(i).pt() > sigma_max) {
          sigma_max = sums.at(i).pt();
          imax = i;
        }
      }
 
      found.push_back(imax);
      vertices_.emplace_back(sums.at(imax));
    }
    pv_index_ = 0;
  }  // end of fastHisto

References funct::abs(), reco::ceil(), dqmiodumpmetadata::counts, HLT_FULL_cff::distance, spr::find(), newFWLiteAna::found, gpuVertexFinder::hist, mps_fire::i, createfilelist::int, dqmiolumiharvest::j, pfDeepBoostedJetPreprocessParams_cfi::lower_bound, LaserClient_cfi::nbins, GetRecoTauVFromDQM_MC_cff::next, StripSubdetector::TID, TrackerTopology::tidRing(), StripSubdetector::TOB, TrackerTopology::tobLayer(), HLT_FULL_cff::track, align::Tracker, and pfDeepBoostedJetPreprocessParams_cfi::upper_bound.

Referenced by VertexProducer::produce().

FastHisto()

void l1tVertexFinder::VertexFinder::FastHisto

(

const TrackerTopology *

tTopo

)

Histogramming algorithm.

fastHistoLooseAssociation()

void l1tVertexFinder::VertexFinder::fastHistoLooseAssociation

(

)

High pT Vertex Algorithm.

Definition at line 462 of file VertexFinder.cc.

                                               {
    float vxPt = 0.;
    RecoVertex leading_vertex;
 
    for (float z = settings_->vx_histogram_min(); z < settings_->vx_histogram_max();
         z += settings_->vx_histogram_binwidth()) {
      RecoVertex vertex;
      for (const L1Track& track : fitTracks_) {
        if (std::abs(z - track.z0()) < settings_->vx_width()) {
          vertex.insert(&track);
        }
      }
      computeAndSetVertexParameters(vertex, {}, {});
      vertex.setZ0(z);
      if (vertex.pt() > vxPt) {
        leading_vertex = vertex;
        vxPt = vertex.pt();
      }
    }
 
    vertices_.emplace_back(leading_vertex);
    pv_index_ = 0;  // by default fastHistoLooseAssociation algorithm finds only hard PV
  }                 // end of fastHistoLooseAssociation

References funct::abs(), HLT_FULL_cff::track, and bphysicsOniaDQM_cfi::vertex.

Referenced by VertexProducer::produce().

FastHistoLooseAssociation()

void l1tVertexFinder::VertexFinder::FastHistoLooseAssociation

(

)

TDR histogramming algorithmn.

findPrimaryVertex()

void l1tVertexFinder::VertexFinder::findPrimaryVertex

(

)

Find the primary vertex.

Definition at line 440 of file VertexFinder.cc.

                                       {
    double vertexPt = 0;
    pv_index_ = 0;
 
    for (unsigned int i = 0; i < vertices_.size(); ++i) {
      if (vertices_[i].pt() > vertexPt) {
        vertexPt = vertices_[i].pt();
        pv_index_ = i;
      }
    }
  }

References mps_fire::i, and DiDispStaMuonMonitor_cfi::pt.

Referenced by VertexProducer::produce().

fitTracks()

const FitTrackCollection& l1tVertexFinder::VertexFinder::fitTracks ( ) const

inline

Storage for tracks out of the L1 Track finder.

Definition at line 65 of file VertexFinder.h.

{ return fitTracks_; }

References fitTracks_.

Referenced by VertexFinder().

GapClustering()

void l1tVertexFinder::VertexFinder::GapClustering

(

)

Gap Clustering Algorithm.

Definition at line 60 of file VertexFinder.cc.

                                   {
    sort(fitTracks_.begin(), fitTracks_.end(), SortTracksByZ0());
    iterations_ = 0;
    RecoVertex Vertex;
    for (unsigned int i = 0; i < fitTracks_.size(); ++i) {
      Vertex.insert(&fitTracks_[i]);
      iterations_++;
      if ((i + 1 < fitTracks_.size() and fitTracks_[i + 1].z0() - fitTracks_[i].z0() > settings_->vx_distance()) or
          i == fitTracks_.size() - 1) {
        if (Vertex.numTracks() >= settings_->vx_minTracks()) {
          computeAndSetVertexParameters(Vertex, {}, {});
          vertices_.push_back(Vertex);
        }
        Vertex.clear();
      }
    }
  }

References mps_fire::i, l1tVertexFinder::Vertex::insert(), l1tVertexFinder::Vertex::numTracks(), or, jetUpdater_cfi::sort, and HltBtagValidation_cff::Vertex.

Referenced by VertexProducer::produce().

HPV()

void l1tVertexFinder::VertexFinder::HPV

(

)

High pT Vertex Algorithm.

Definition at line 371 of file VertexFinder.cc.

                         {
    iterations_ = 0;
    sort(fitTracks_.begin(), fitTracks_.end(), SortTracksByPt());
 
    RecoVertex vertex;
    bool first = true;
    float z = 99.;
    for (const L1Track& track : fitTracks_) {
      if (track.pt() < 50.) {
        if (first) {
          first = false;
          z = track.z0();
          vertex.insert(&track);
        } else {
          if (std::abs(track.z0() - z) < settings_->vx_distance())
            vertex.insert(&track);
        }
      }
    }
 
    computeAndSetVertexParameters(vertex, {}, {});
    vertex.setZ0(z);
    vertices_.push_back(vertex);
  }

References funct::abs(), first, jetUpdater_cfi::sort, HLT_FULL_cff::track, and bphysicsOniaDQM_cfi::vertex.

Referenced by VertexProducer::produce().

IterationsPerTrack()

unsigned int l1tVertexFinder::VertexFinder::IterationsPerTrack ( ) const

inline

Accessors.

Number of iterations

Definition at line 44 of file VertexFinder.h.

{ return double(iterations_) / double(fitTracks_.size()); }

References fitTracks_, and iterations_.

iterationsPerTrack()

unsigned int l1tVertexFinder::VertexFinder::iterationsPerTrack ( ) const

inline

Number of iterations.

Definition at line 104 of file VertexFinder.h.

{ return double(iterations_) / double(fitTracks_.size()); }

References fitTracks_, and iterations_.

Kmeans()

void l1tVertexFinder::VertexFinder::Kmeans

(

)

Kmeans Algorithm.

Definition at line 396 of file VertexFinder.cc.

                            {
    unsigned int NumberOfClusters = settings_->vx_kmeans_nclusters();
 
    vertices_.resize(NumberOfClusters);
    float ClusterSeparation = 30. / NumberOfClusters;
 
    for (unsigned int i = 0; i < NumberOfClusters; ++i) {
      float ClusterCentre = -15. + ClusterSeparation * (i + 0.5);
      vertices_[i].setZ0(ClusterCentre);
    }
    unsigned int iterations = 0;
    // Initialise Clusters
    while (iterations < settings_->vx_kmeans_iterations()) {
      for (unsigned int i = 0; i < NumberOfClusters; ++i) {
        vertices_[i].clear();
      }
 
      for (const L1Track& track : fitTracks_) {
        float distance = 9999;
        if (iterations == settings_->vx_kmeans_iterations() - 3)
          distance = settings_->vx_distance() * 2;
        if (iterations > settings_->vx_kmeans_iterations() - 3)
          distance = settings_->vx_distance();
        unsigned int ClusterId;
        bool NA = true;
        for (unsigned int id = 0; id < NumberOfClusters; ++id) {
          if (std::abs(track.z0() - vertices_[id].z0()) < distance) {
            distance = std::abs(track.z0() - vertices_[id].z0());
            ClusterId = id;
            NA = false;
          }
        }
        if (!NA) {
          vertices_[ClusterId].insert(&track);
        }
      }
      for (unsigned int i = 0; i < NumberOfClusters; ++i) {
        if (vertices_[i].numTracks() >= settings_->vx_minTracks())
          computeAndSetVertexParameters(vertices_[i], {}, {});
      }
      iterations++;
    }
  }

References funct::abs(), HLT_FULL_cff::distance, mps_fire::i, triggerObjects_cff::id, fastsim::Constants::NA, and HLT_FULL_cff::track.

Referenced by VertexProducer::produce().

maxDistance()

float l1tVertexFinder::VertexFinder::maxDistance	(	RecoVertex<>	cluster0,
		RecoVertex<>	cluster1
	)

Find maximum distance in two clusters of tracks.

Definition at line 78 of file VertexFinder.cc.

                                                                              {
    float distance = 0;
    for (const L1Track* track0 : cluster0.tracks()) {
      for (const L1Track* track1 : cluster1.tracks()) {
        if (std::abs(track0->z0() - track1->z0()) > distance) {
          distance = std::abs(track0->z0() - track1->z0());
        }
      }
    }
 
    return distance;
  }

References funct::abs(), HLT_FULL_cff::distance, and l1tVertexFinder::RecoVertex< T >::tracks().

MaxDistance()

float l1tVertexFinder::VertexFinder::MaxDistance	(	RecoVertex<>	cluster0,
		RecoVertex<>	cluster1
	)

Find maximum distance in two clusters of tracks.

meanDistance()

float l1tVertexFinder::VertexFinder::meanDistance	(	RecoVertex<>	cluster0,
		RecoVertex<>	cluster1
	)

Find average distance in two clusters of tracks.

Definition at line 104 of file VertexFinder.cc.

                                                                               {
    float distanceSum = 0;
 
    for (const L1Track* track0 : cluster0.tracks()) {
      for (const L1Track* track1 : cluster1.tracks()) {
        distanceSum += std::abs(track0->z0() - track1->z0());
      }
    }
 
    float distance = distanceSum / (cluster0.numTracks() * cluster1.numTracks());
    return distance;
  }

References funct::abs(), HLT_FULL_cff::distance, l1tVertexFinder::RecoVertex< T >::numTracks(), and l1tVertexFinder::RecoVertex< T >::tracks().

MeanDistance()

float l1tVertexFinder::VertexFinder::MeanDistance	(	RecoVertex<>	cluster0,
		RecoVertex<>	cluster1
	)

Find average distance in two clusters of tracks.

minDistance()

float l1tVertexFinder::VertexFinder::minDistance	(	RecoVertex<>	cluster0,
		RecoVertex<>	cluster1
	)

Find minimum distance in two clusters of tracks.

Definition at line 91 of file VertexFinder.cc.

                                                                              {
    float distance = 9999;
    for (const L1Track* track0 : cluster0.tracks()) {
      for (const L1Track* track1 : cluster1.tracks()) {
        if (std::abs(track0->z0() - track1->z0()) < distance) {
          distance = std::abs(track0->z0() - track1->z0());
        }
      }
    }
 
    return distance;
  }

References funct::abs(), HLT_FULL_cff::distance, and l1tVertexFinder::RecoVertex< T >::tracks().

MinDistance()

float l1tVertexFinder::VertexFinder::MinDistance	(	RecoVertex<>	cluster0,
		RecoVertex<>	cluster1
	)

Find minimum distance in two clusters of tracks.

numInputTracks()

unsigned int l1tVertexFinder::VertexFinder::numInputTracks ( ) const

inline

Storage for tracks out of the L1 Track finder.

Definition at line 46 of file VertexFinder.h.

{ return fitTracks_.size(); }

References fitTracks_.

NumIterations()

unsigned int l1tVertexFinder::VertexFinder::NumIterations ( ) const

inline

Number of iterations.

Definition at line 48 of file VertexFinder.h.

{ return iterations_; }

References iterations_.

numIterations()

unsigned int l1tVertexFinder::VertexFinder::numIterations ( ) const

inline

Number of iterations.

Definition at line 102 of file VertexFinder.h.

{ return iterations_; }

References iterations_.

numVertices()

unsigned int l1tVertexFinder::VertexFinder::numVertices ( ) const

inline

Number of reconstructed vertices.

Definition at line 50 of file VertexFinder.h.

{ return vertices_.size(); }

References vertices_.

primaryVertex()

RecoVertex l1tVertexFinder::VertexFinder::primaryVertex ( ) const

inline

Reconstructed Primary Vertex.

Definition at line 52 of file VertexFinder.h.

                                       {
      if (pv_index_ < vertices_.size())
        return vertices_[pv_index_];
      else {
        edm::LogWarning("VertexFinder") << "PrimaryVertex::No Primary Vertex has been found.";
        return RecoVertex<>();
      }
    }

References pv_index_, and vertices_.

primaryVertexId()

unsigned int l1tVertexFinder::VertexFinder::primaryVertexId ( ) const

inline

Reconstructed Primary Vertex Id.

Definition at line 61 of file VertexFinder.h.

{ return pv_index_; }

References pv_index_.

PVR()

void l1tVertexFinder::VertexFinder::PVR

(

)

Principal Vertex Reconstructor algorithm.

Definition at line 241 of file VertexFinder.cc.

                         {
    bool start = true;
    FitTrackCollection discardedTracks, acceptedTracks;
    iterations_ = 0;
    for (const L1Track& track : fitTracks_) {
      acceptedTracks.push_back(track);
    }
 
    while (discardedTracks.size() >= settings_->vx_minTracks() or start == true) {
      start = false;
      bool removing = true;
      discardedTracks.clear();
      while (removing) {
        float oldDistance = 0.;
 
        if (settings_->debug() > 2)
          edm::LogInfo("VertexFinder") << "PVR::AcceptedTracks " << acceptedTracks.size();
 
        float z0start = 0;
        for (const L1Track& track : acceptedTracks) {
          z0start += track.z0();
          iterations_++;
        }
 
        z0start /= acceptedTracks.size();
        if (settings_->debug() > 2)
          edm::LogInfo("VertexFinder") << "PVR::z0 vertex " << z0start;
        FitTrackCollection::iterator badTrackIt = acceptedTracks.end();
        removing = false;
 
        for (FitTrackCollection::iterator it = acceptedTracks.begin(); it < acceptedTracks.end(); ++it) {
          const L1Track* track = &*it;
          iterations_++;
          if (std::abs(track->z0() - z0start) > settings_->vx_distance() and
              std::abs(track->z0() - z0start) > oldDistance) {
            badTrackIt = it;
            oldDistance = std::abs(track->z0() - z0start);
            removing = true;
          }
        }
 
        if (removing) {
          const L1Track badTrack = *badTrackIt;
          if (settings_->debug() > 2)
            edm::LogInfo("VertexFinder") << "PVR::Removing track " << badTrack.z0() << " at distance " << oldDistance;
          discardedTracks.push_back(badTrack);
          acceptedTracks.erase(badTrackIt);
        }
      }
 
      if (acceptedTracks.size() >= settings_->vx_minTracks()) {
        RecoVertex vertex;
        for (const L1Track& track : acceptedTracks) {
          vertex.insert(&track);
        }
        computeAndSetVertexParameters(vertex, {}, {});
        vertices_.push_back(vertex);
      }
      if (settings_->debug() > 2)
        edm::LogInfo("VertexFinder") << "PVR::DiscardedTracks size " << discardedTracks.size();
      acceptedTracks.clear();
      acceptedTracks = discardedTracks;
    }
  }

References funct::abs(), or, HLT_FULL_cff::track, bphysicsOniaDQM_cfi::vertex, and l1tVertexFinder::L1Track::z0().

Referenced by VertexProducer::produce().

SortVerticesInPt()

void l1tVertexFinder::VertexFinder::SortVerticesInPt ( )

inline

Sort vertices in pT.

Definition at line 90 of file VertexFinder.h.

                            {
      std::sort(vertices_.begin(), vertices_.end(), [](const RecoVertex<>& vertex0, const RecoVertex<>& vertex1) {
        return (vertex0.pt() > vertex1.pt());
      });
    }

References l1tVertexFinder::RecoVertex< T >::pt(), jetUpdater_cfi::sort, and vertices_.

Referenced by VertexProducer::produce().

SortVerticesInZ0()

void l1tVertexFinder::VertexFinder::SortVerticesInZ0 ( )

inline

Sort vertices in z.

Definition at line 96 of file VertexFinder.h.

                            {
      std::sort(vertices_.begin(), vertices_.end(), [](const RecoVertex<>& vertex0, const RecoVertex<>& vertex1) {
        return (vertex0.z0() < vertex1.z0());
      });
    }

References jetUpdater_cfi::sort, vertices_, and l1tVertexFinder::RecoVertex< T >::z0().

strided_iota()

template<typename ForwardIterator , typename T >

void l1tVertexFinder::VertexFinder::strided_iota ( ForwardIterator  first, ForwardIterator  last, T  value, T  stride  )

inline

Definition at line 107 of file VertexFinder.h.

                                                                                      {
      while (first != last) {
        *first++ = value;
        value += stride;
      }
    }

References first, dqmdumpme::last, gpuPixelDoublets::stride, and relativeConstraints::value.

vertices()

const std::vector<RecoVertex<> >& l1tVertexFinder::VertexFinder::vertices ( ) const

inline

Returns the z positions of the reconstructed primary vertices.

Definition at line 63 of file VertexFinder.h.

{ return vertices_; }

References vertices_.

Referenced by VertexProducer::produce().

Member Data Documentation

fitTracks_

FitTrackCollection l1tVertexFinder::VertexFinder::fitTracks_

private

Definition at line 149 of file VertexFinder.h.

Referenced by fitTracks(), IterationsPerTrack(), iterationsPerTrack(), numInputTracks(), and VertexFinder().

iterations_

unsigned int l1tVertexFinder::VertexFinder::iterations_

private

Definition at line 151 of file VertexFinder.h.

Referenced by IterationsPerTrack(), iterationsPerTrack(), NumIterations(), and numIterations().

numMatchedVertices_

unsigned int l1tVertexFinder::VertexFinder::numMatchedVertices_

private

Definition at line 148 of file VertexFinder.h.

pv_index_

unsigned int l1tVertexFinder::VertexFinder::pv_index_

private

Definition at line 150 of file VertexFinder.h.

Referenced by primaryVertex(), and primaryVertexId().

settings_

const AlgoSettings* l1tVertexFinder::VertexFinder::settings_

private

Definition at line 146 of file VertexFinder.h.

Referenced by VertexFinder().

vertices_

std::vector<RecoVertex<> > l1tVertexFinder::VertexFinder::vertices_

private

Definition at line 147 of file VertexFinder.h.

Referenced by numVertices(), primaryVertex(), SortVerticesInPt(), SortVerticesInZ0(), and vertices().