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00001 #include "TopQuarkAnalysis/TopKinFitter/interface/CovarianceMatrix.h"
00002 
00003 #include "CommonTools/Utils/interface/StringObjectFunction.h"
00004 #include "CommonTools/Utils/interface/StringCutObjectSelector.h"
00005 
00006 CovarianceMatrix::CovarianceMatrix(const std::vector<edm::ParameterSet> udscResolutions, const std::vector<edm::ParameterSet> bResolutions,
00007                                    const std::vector<double> jetEnergyResolutionScaleFactors, const std::vector<double> jetEnergyResolutionEtaBinning):
00008   jetEnergyResolutionScaleFactors_(jetEnergyResolutionScaleFactors), jetEnergyResolutionEtaBinning_(jetEnergyResolutionEtaBinning)
00009 {
00010   for(std::vector<edm::ParameterSet>::const_iterator iSet = udscResolutions.begin(); iSet != udscResolutions.end(); ++iSet){
00011     if(iSet->exists("bin")) binsUdsc_.push_back(iSet->getParameter<std::string>("bin"));
00012     else if(udscResolutions.size()==1) binsUdsc_.push_back("");
00013     else throw cms::Exception("Configuration") << "Parameter 'bin' is needed if more than one PSet is specified!\n";
00014     
00015     funcEtUdsc_.push_back(iSet->getParameter<std::string>("et"));
00016     funcEtaUdsc_.push_back(iSet->getParameter<std::string>("eta"));
00017     funcPhiUdsc_.push_back(iSet->getParameter<std::string>("phi"));
00018   }
00019   for(std::vector<edm::ParameterSet>::const_iterator iSet = bResolutions.begin(); iSet != bResolutions.end(); ++iSet){
00020     if(iSet->exists("bin")) binsB_.push_back(iSet->getParameter<std::string>("bin"));
00021     else if(bResolutions.size()==1) binsB_.push_back("");
00022     else throw cms::Exception("Configuration") << "Parameter 'bin' is needed if more than one PSet is specified!\n";
00023     
00024     funcEtB_.push_back(iSet->getParameter<std::string>("et"));
00025     funcEtaB_.push_back(iSet->getParameter<std::string>("eta"));
00026     funcPhiB_.push_back(iSet->getParameter<std::string>("phi"));
00027   }
00028 }
00029 
00030 CovarianceMatrix::CovarianceMatrix(const std::vector<edm::ParameterSet> udscResolutions, const std::vector<edm::ParameterSet> bResolutions,
00031                                    const std::vector<edm::ParameterSet> lepResolutions, const std::vector<edm::ParameterSet> metResolutions,
00032                                    const std::vector<double> jetEnergyResolutionScaleFactors, const std::vector<double> jetEnergyResolutionEtaBinning):
00033   jetEnergyResolutionScaleFactors_(jetEnergyResolutionScaleFactors), jetEnergyResolutionEtaBinning_(jetEnergyResolutionEtaBinning)
00034 {
00035   if(jetEnergyResolutionScaleFactors_.size()+1!=jetEnergyResolutionEtaBinning_.size())
00036     throw cms::Exception("Configuration") << "The number of scale factors does not fit to the number of eta bins!\n";
00037   for(unsigned int i=0; i<jetEnergyResolutionEtaBinning_.size(); i++)
00038     if(jetEnergyResolutionEtaBinning_[i]<0. && i<jetEnergyResolutionEtaBinning_.size()-1)
00039       throw cms::Exception("Configuration") << "eta binning in absolut values required!\n";
00040 
00041   for(std::vector<edm::ParameterSet>::const_iterator iSet = udscResolutions.begin(); iSet != udscResolutions.end(); ++iSet){
00042     if(iSet->exists("bin")) binsUdsc_.push_back(iSet->getParameter<std::string>("bin"));
00043     else if(udscResolutions.size()==1) binsUdsc_.push_back("");
00044     else throw cms::Exception("Configuration") << "Parameter 'bin' is needed if more than one PSet is specified!\n";
00045     
00046     funcEtUdsc_.push_back(iSet->getParameter<std::string>("et"));
00047     funcEtaUdsc_.push_back(iSet->getParameter<std::string>("eta"));
00048     funcPhiUdsc_.push_back(iSet->getParameter<std::string>("phi"));
00049   }
00050   for(std::vector<edm::ParameterSet>::const_iterator iSet = bResolutions.begin(); iSet != bResolutions.end(); ++iSet){
00051     if(iSet->exists("bin")) binsB_.push_back(iSet->getParameter<std::string>("bin"));
00052     else if(bResolutions.size()==1) binsB_.push_back("");
00053     else throw cms::Exception("Configuration") << "Parameter 'bin' is needed if more than one PSet is specified!\n";
00054     
00055     funcEtB_.push_back(iSet->getParameter<std::string>("et"));
00056     funcEtaB_.push_back(iSet->getParameter<std::string>("eta"));
00057     funcPhiB_.push_back(iSet->getParameter<std::string>("phi"));
00058   }
00059   for(std::vector<edm::ParameterSet>::const_iterator iSet = lepResolutions.begin(); iSet != lepResolutions.end(); ++iSet){
00060     if(iSet->exists("bin")) binsLep_.push_back(iSet->getParameter<std::string>("bin"));
00061     else if(lepResolutions.size()==1) binsLep_.push_back("");
00062     else throw cms::Exception("Configuration") << "Parameter 'bin' is needed if more than one PSet is specified!\n";
00063     
00064     funcEtLep_.push_back(iSet->getParameter<std::string>("et"));
00065     funcEtaLep_.push_back(iSet->getParameter<std::string>("eta"));
00066     funcPhiLep_.push_back(iSet->getParameter<std::string>("phi"));
00067   }
00068   for(std::vector<edm::ParameterSet>::const_iterator iSet = metResolutions.begin(); iSet != metResolutions.end(); ++iSet){
00069     if(iSet->exists("bin")) binsMet_.push_back(iSet->getParameter<std::string>("bin"));
00070     else if(metResolutions.size()==1) binsMet_.push_back("");
00071     else throw cms::Exception("Configuration") << "Parameter 'bin' is needed if more than one PSet is specified!\n";
00072     
00073     funcEtMet_.push_back(iSet->getParameter<std::string>("et"));
00074     funcEtaMet_.push_back(iSet->getParameter<std::string>("eta"));
00075     funcPhiMet_.push_back(iSet->getParameter<std::string>("phi"));
00076   }
00077 }
00078 
00079 double CovarianceMatrix::getResolution(const TLorentzVector& object, const ObjectType objType, const std::string& whichResolution)
00080 {
00081   std::vector<std::string> * bins_, * funcEt_, * funcEta_, * funcPhi_;
00082 
00083   switch(objType) {
00084   case kUdscJet:
00085     bins_    = &binsUdsc_;
00086     funcEt_  = &funcEtUdsc_;
00087     funcEta_ = &funcEtaUdsc_;
00088     funcPhi_ = &funcPhiUdsc_;
00089     break;
00090   case kBJet:
00091     bins_    = &binsB_;
00092     funcEt_  = &funcEtB_;
00093     funcEta_ = &funcEtaB_;
00094     funcPhi_ = &funcPhiB_;
00095     break;
00096   case kMuon:
00097     bins_    = &binsLep_;
00098     funcEt_  = &funcEtLep_;
00099     funcEta_ = &funcEtaLep_;
00100     funcPhi_ = &funcPhiLep_;
00101     break;
00102   case kElectron:
00103     bins_    = &binsLep_;
00104     funcEt_  = &funcEtLep_;
00105     funcEta_ = &funcEtaLep_;
00106     funcPhi_ = &funcPhiLep_;
00107     break;
00108   case kMet:
00109     bins_    = &binsMet_;
00110     funcEt_  = &funcEtMet_;
00111     funcEta_ = &funcEtaMet_;
00112     funcPhi_ = &funcPhiMet_;
00113     break;
00114   default:
00115     throw cms::Exception("UnsupportedObject") << "The object given is not supported!\n";
00116   }
00117 
00118   int selectedBin=-1;
00119   reco::LeafCandidate candidate;
00120   for(unsigned int i=0; i<bins_->size(); ++i){
00121     StringCutObjectSelector<reco::LeafCandidate> select_(bins_->at(i));
00122     candidate = reco::LeafCandidate( 0, reco::LeafCandidate::LorentzVector(object.Px(), object.Py(), object.Pz(), object.Energy()) );
00123     if(select_(candidate)){
00124       selectedBin = i;
00125       break;
00126     }
00127   }
00128   double res = 0;
00129   if(selectedBin>=0){
00130     if(whichResolution == "et")       res = StringObjectFunction<reco::LeafCandidate>(funcEt_ ->at(selectedBin)).operator()(candidate);
00131     else if(whichResolution == "eta") res = StringObjectFunction<reco::LeafCandidate>(funcEta_->at(selectedBin)).operator()(candidate);
00132     else if(whichResolution == "phi") res = StringObjectFunction<reco::LeafCandidate>(funcPhi_->at(selectedBin)).operator()(candidate);
00133     else throw cms::Exception("ProgrammingError") << "Only 'et', 'eta' and 'phi' resolutions supported!\n";
00134   }
00135   return res;
00136 }
00137 
00138 TMatrixD CovarianceMatrix::setupMatrix(const TLorentzVector& object, const ObjectType objType, const TopKinFitter::Param param)
00139 {
00140   TMatrixD CovM3 (3,3); CovM3.Zero();
00141   TMatrixD CovM4 (4,4); CovM4.Zero();
00142   const double pt  = object.Pt();
00143   const double eta = object.Eta();
00144   switch(objType) {
00145   case kUdscJet:
00146     // if object is a non-b jet
00147     {
00148       res::HelperJet jetRes;
00149       switch(param) {
00150       case TopKinFitter::kEMom :
00151         CovM4(0,0) = pow(jetRes.a (pt, eta, res::HelperJet::kUds), 2);
00152         CovM4(1,1) = pow(jetRes.b (pt, eta, res::HelperJet::kUds), 2);
00153         CovM4(2,2) = pow(jetRes.c (pt, eta, res::HelperJet::kUds), 2);
00154         CovM4(3,3) = pow(jetRes.d (pt, eta, res::HelperJet::kUds), 2);
00155         return CovM4;
00156       case TopKinFitter::kEtEtaPhi : 
00157         if(!binsUdsc_.size()){
00158           CovM3(0,0) = pow(jetRes.et (pt, eta, res::HelperJet::kUds), 2);
00159           CovM3(0,0)*= pow(getEtaDependentScaleFactor(object)       , 2);
00160           CovM3(1,1) = pow(jetRes.eta(pt, eta, res::HelperJet::kUds), 2);
00161           CovM3(2,2) = pow(jetRes.phi(pt, eta, res::HelperJet::kUds), 2);
00162         }
00163         else{
00164           CovM3(0,0) = pow(getResolution(object, objType, "et") , 2);
00165           CovM3(0,0)*= pow(getEtaDependentScaleFactor(object)   , 2);
00166           CovM3(1,1) = pow(getResolution(object, objType, "eta"), 2);
00167           CovM3(2,2) = pow(getResolution(object, objType, "phi"), 2);
00168         }   
00169         return CovM3;
00170       case TopKinFitter::kEtThetaPhi :
00171         CovM3(0,0) = pow(jetRes.et   (pt, eta, res::HelperJet::kUds), 2);
00172         CovM3(0,0)*= pow(getEtaDependentScaleFactor(object)         , 2);
00173         CovM3(1,1) = pow(jetRes.theta(pt, eta, res::HelperJet::kUds), 2);
00174         CovM3(2,2) = pow(jetRes.phi  (pt, eta, res::HelperJet::kUds), 2);
00175         return CovM3;
00176       }
00177     }
00178     break;
00179   case kBJet:
00180     // if object is a b jet
00181     {
00182       res::HelperJet jetRes;
00183       switch(param) {
00184       case TopKinFitter::kEMom :
00185         CovM4(0,0) = pow(jetRes.a (pt, eta, res::HelperJet::kB), 2);
00186         CovM4(1,1) = pow(jetRes.b (pt, eta, res::HelperJet::kB), 2);
00187         CovM4(2,2) = pow(jetRes.c (pt, eta, res::HelperJet::kB), 2);
00188         CovM4(3,3) = pow(jetRes.d (pt, eta, res::HelperJet::kB), 2);
00189         return CovM4;
00190       case TopKinFitter::kEtEtaPhi : 
00191         if(!binsUdsc_.size()){
00192           CovM3(0,0) = pow(jetRes.et (pt, eta, res::HelperJet::kB), 2);
00193           CovM3(0,0)*= pow(getEtaDependentScaleFactor(object)     , 2);
00194           CovM3(1,1) = pow(jetRes.eta(pt, eta, res::HelperJet::kB), 2);
00195           CovM3(2,2) = pow(jetRes.phi(pt, eta, res::HelperJet::kB), 2);
00196         }
00197         else{
00198           CovM3(0,0) = pow(getResolution(object, objType, "et") , 2); 
00199           CovM3(0,0)*= pow(getEtaDependentScaleFactor(object)   , 2);
00200           CovM3(1,1) = pow(getResolution(object, objType, "eta"), 2); 
00201           CovM3(2,2) = pow(getResolution(object, objType, "phi"), 2);
00202         }
00203         return CovM3;
00204       case TopKinFitter::kEtThetaPhi :
00205         CovM3(0,0) = pow(jetRes.et   (pt, eta, res::HelperJet::kB), 2);
00206         CovM3(0,0)*= pow(getEtaDependentScaleFactor(object)       , 2);
00207         CovM3(1,1) = pow(jetRes.theta(pt, eta, res::HelperJet::kB), 2);
00208         CovM3(2,2) = pow(jetRes.phi  (pt, eta, res::HelperJet::kB), 2);
00209         return CovM3;
00210       }
00211     }
00212     break;
00213   case kMuon:
00214     // if object is a muon
00215     {
00216       res::HelperMuon muonRes;
00217       switch(param){
00218       case TopKinFitter::kEMom :
00219         CovM3(0,0) = pow(muonRes.a (pt, eta), 2);
00220         CovM3(1,1) = pow(muonRes.b (pt, eta), 2); 
00221         CovM3(2,2) = pow(muonRes.c (pt, eta), 2);
00222         return CovM3;
00223       case TopKinFitter::kEtEtaPhi :
00224         if(!binsLep_.size()){
00225           CovM3(0,0) = pow(muonRes.et (pt, eta), 2);
00226           CovM3(1,1) = pow(muonRes.eta(pt, eta), 2); 
00227           CovM3(2,2) = pow(muonRes.phi(pt, eta), 2);
00228         }
00229         else{
00230           CovM3(0,0) = pow(getResolution(object, objType, "et") , 2);
00231           CovM3(1,1) = pow(getResolution(object, objType, "eta"), 2);
00232           CovM3(2,2) = pow(getResolution(object, objType, "phi"), 2);
00233         }
00234         return CovM3;
00235       case TopKinFitter::kEtThetaPhi :
00236         CovM3(0,0) = pow(muonRes.et   (pt, eta), 2);
00237         CovM3(1,1) = pow(muonRes.theta(pt, eta), 2); 
00238         CovM3(2,2) = pow(muonRes.phi  (pt, eta), 2);
00239         return CovM3;
00240       }
00241     }
00242     break;
00243   case kElectron:
00244     {
00245       // if object is an electron
00246       res::HelperElectron elecRes;
00247       switch(param){
00248       case TopKinFitter::kEMom :
00249         CovM3(0,0) = pow(elecRes.a (pt, eta), 2);
00250         CovM3(1,1) = pow(elecRes.b (pt, eta), 2); 
00251         CovM3(2,2) = pow(elecRes.c (pt, eta), 2);
00252         return CovM3;
00253       case TopKinFitter::kEtEtaPhi :
00254         if(!binsLep_.size()){
00255           CovM3(0,0) = pow(elecRes.et (pt, eta), 2);
00256           CovM3(1,1) = pow(elecRes.eta(pt, eta), 2); 
00257           CovM3(2,2) = pow(elecRes.phi(pt, eta), 2);
00258         }
00259         else{
00260           CovM3(0,0) = pow(getResolution(object, objType, "et") , 2);
00261           CovM3(1,1) = pow(getResolution(object, objType, "eta"), 2);
00262           CovM3(2,2) = pow(getResolution(object, objType, "phi"), 2);
00263         }
00264         return CovM3;
00265       case TopKinFitter::kEtThetaPhi :
00266         CovM3(0,0) = pow(elecRes.et   (pt, eta), 2);
00267         CovM3(1,1) = pow(elecRes.theta(pt, eta), 2); 
00268         CovM3(2,2) = pow(elecRes.phi  (pt, eta), 2);
00269         return CovM3;
00270       }
00271     }
00272     break;
00273   case kMet:
00274     // if object is met
00275     {
00276       res::HelperMET metRes;
00277       switch(param){
00278       case TopKinFitter::kEMom :
00279         CovM3(0,0) = pow(metRes.a(pt), 2);
00280         CovM3(1,1) = pow(metRes.b(pt), 2);
00281         CovM3(2,2) = pow(metRes.c(pt), 2);
00282         return CovM3;
00283       case TopKinFitter::kEtEtaPhi :
00284         if(!binsMet_.size()){
00285           CovM3(0,0) = pow(metRes.et(pt) , 2);
00286           CovM3(1,1) = pow(        9999. , 2);
00287           CovM3(2,2) = pow(metRes.phi(pt), 2);
00288         }
00289         else{
00290           CovM3(0,0) = pow(getResolution(object, objType, "et") , 2);
00291           CovM3(1,1) = pow(getResolution(object, objType, "eta"), 2);
00292           CovM3(2,2) = pow(getResolution(object, objType, "phi"), 2);
00293         }
00294         return CovM3;
00295       case TopKinFitter::kEtThetaPhi :
00296         CovM3(0,0) = pow(metRes.et(pt) , 2);
00297         CovM3(1,1) = pow(        9999. , 2);
00298         CovM3(2,2) = pow(metRes.phi(pt), 2);
00299         return CovM3;
00300       }
00301     }
00302     break;
00303   }
00304   cms::Exception("Logic") << "Something went wrong while trying to setup a covariance matrix!\n";
00305   return CovM4; //should never get here
00306 }
00307 
00308 double CovarianceMatrix::getEtaDependentScaleFactor(const TLorentzVector& object)
00309 {
00310   double etaDependentScaleFactor = 1.;
00311   for(unsigned int i=0; i<jetEnergyResolutionEtaBinning_.size(); i++){
00312     if(std::abs(object.Eta())>=jetEnergyResolutionEtaBinning_[i] && jetEnergyResolutionEtaBinning_[i]>=0.){
00313       if(i==jetEnergyResolutionEtaBinning_.size()-1) {
00314         edm::LogWarning("CovarianceMatrix") << "object eta ("<<std::abs(object.Eta())<<") beyond last eta bin ("<<jetEnergyResolutionEtaBinning_[i]<<") using scale factor 1.0!";
00315         etaDependentScaleFactor=1.;
00316         break;
00317       }
00318       etaDependentScaleFactor=jetEnergyResolutionScaleFactors_[i];
00319     }
00320     else
00321       break;
00322   }
00323   return etaDependentScaleFactor;
00324 }
/data/refman/pasoursint/CMSSW_6_1_1/src/TopQuarkAnalysis/TopKinFitter/src/CovarianceMatrix.cc
