#include <MatchJet.h>

Public Member Functions
void	matchCollections (const edm::RefToBaseVector< reco::Jet > &refJets, const edm::RefToBaseVector< reco::Jet > &recJets, const reco::JetCorrector *corrector)
	match the collections More...

	MatchJet ()

	MatchJet (const edm::ParameterSet &pSet)

edm::RefToBase< reco::Jet >	operator() (const edm::RefToBase< reco::Jet > &recJet) const
	Returns the matched "reference" jet. More...

void	setThreshold (const double &energy)

Private Attributes
double	maxChi2

CorrectJet	recJetCorrector

edm::RefToBaseVector< reco::Jet >	recJets

std::vector< int >	recToRef

CorrectJet	refJetCorrector

edm::RefToBaseVector< reco::Jet >	refJets

std::vector< int >	refToRec

double	sigmaDeltaE

double	sigmaDeltaR

double	threshold

Detailed Description

Match jets

Definition at line 19 of file MatchJet.h.

Constructor & Destructor Documentation

MatchJet::MatchJet ( )

inline

Definition at line 22 of file MatchJet.h.

22 {}

MatchJet::MatchJet ( const edm::ParameterSet & pSet )

Definition at line 43 of file MatchJet.cc.

                                               :
   maxChi2(pSet.getParameter<double>("maxChi2")),
   sigmaDeltaR(pSet.getParameter<double>("sigmaDeltaR")),
   sigmaDeltaE(pSet.getParameter<double>("sigmaDeltaE")),
   threshold(1.0)
 {
 }

Member Function Documentation

void MatchJet::matchCollections	(	const edm::RefToBaseVector< reco::Jet > &	refJets,
		const edm::RefToBaseVector< reco::Jet > &	recJets,
		const reco::JetCorrector *	corrector
	)

match the collections

Definition at line 51 of file MatchJet.cc.

References edm::RefToBaseVector< T >::begin(), edm::RefToBaseVector< T >::clear(), edm::RefToBaseVector< T >::end(), reco::LeafCandidate::energy(), metsig::jet, btag::Matching< Delta >::match(), MultipleCompare::Match(), matches, maxChi2, edm::RefToBaseVector< T >::push_back(), reco::LeafCandidate::px(), reco::LeafCandidate::py(), reco::LeafCandidate::pz(), recJetCorrector, recJets, recToRef, refJetCorrector, refJets, refToRec, CorrectJet::setCorrector(), sigmaDeltaE, sigmaDeltaR, edm::RefToBaseVector< T >::size(), and threshold.

Referenced by BTagPerformanceAnalyzerMC::getJetWithFlavour().

 {
         refJetCorrector.setCorrector(corrector);
         recJetCorrector.setCorrector(corrector);
     
         typedef ROOT::Math::Cartesian3D<double> Vector;
 
     std::vector<Vector> corrRefJets;
     refJets.clear();
     for(edm::RefToBaseVector<reco::Jet>::const_iterator iter = refJets.begin();
             iter != refJets_.end(); ++iter) {
         edm::RefToBase<reco::Jet> jetRef = *iter;
         reco::Jet jet = refJetCorrector(*jetRef);
         if (jet.energy() < threshold)
             continue;
 
         corrRefJets.push_back(Vector(jet.px(), jet.py(), jet.pz()));
         refJets.push_back(jetRef);
     }
 
     std::vector<Vector> corrRecJets;
     recJets.clear();
     for(edm::RefToBaseVector<reco::Jet>::const_iterator iter = recJets.begin();
             iter != recJets_.end(); ++iter) {
         edm::RefToBase<reco::Jet> jetRec = *iter;
         reco::Jet jet = recJetCorrector(*jetRec);
         if (jet.energy() < threshold)
             continue;
 
         corrRecJets.push_back(Vector(jet.px(), jet.py(), jet.pz()));
         recJets.push_back(jetRec);
     }
 
     this->refJets = refJets;
     refToRec.clear();
     refToRec.resize(refJets.size(), -1);
 
     this->recJets = recJets;
     recToRef.clear();
     recToRef.resize(recJets.size(), -1);
 
     Matching<double> matching(corrRefJets, corrRecJets,
                               JetDistance<Vector, Vector, double>(
                                     sigmaDeltaR, sigmaDeltaE));
     typedef Matching<double>::Match Match;
 
     const std::vector<Match>& matches =
         matching.match(std::less<double>(),
                        std::bind2nd(std::less<double>(), maxChi2));
     for(std::vector<Match>::const_iterator iter = matches.begin();
         iter != matches.end(); ++iter) {
         refToRec[iter->index1] = iter->index2;
         recToRef[iter->index2] = iter->index1;
     }
 }

edm::RefToBase< reco::Jet > MatchJet::operator() ( const edm::RefToBase< reco::Jet > & recJet ) const

Returns the matched "reference" jet.

Definition at line 112 of file MatchJet.cc.

References i, edm::RefToBaseVector< T >::id(), edm::RefToBase< T >::id(), match(), recJets, recToRef, refJets, mps_fire::result, and edm::RefToBaseVector< T >::size().

 {
     edm::RefToBase<reco::Jet> result;
     if (recJet.id() != recJets.id())
         return result;
 
     for(unsigned int i = 0; i != recJets.size(); ++i) {
         if (recJets[i] == recJet) {
             int match = recToRef[i];
             if (match >= 0)
                 result = refJets[match];
             break;
         }
     }
 
     return result;
 }