Class to calculate MC resolutions for pat objects. More...

#include "PhysicsTools/PatUtils/interface/ObjectResolutionCalc.h"

Public Member Functions
int	etaBin (float eta)

	ObjectResolutionCalc ()

	ObjectResolutionCalc (TString resopath, bool useNN)

float	obsRes (int obs, int eta, float eT)

template<typename T >
void	operator() (T &obj)

	~ObjectResolutionCalc ()

Private Attributes
std::vector< float >	etaBinVals_

TF1	fResVsEt_ [10][10]

TMultiLayerPerceptron *	network_ [10]

TFile *	resoFile_

bool	useNN_

Detailed Description

Class to calculate MC resolutions for pat objects.

Author: Jan Heyninck, Petra Van Mulders, Christophe Delaere

Version

Id:: ObjectResolutionCalc.h,v 1.5 2008/10/08 19:19:25 gpetrucc Exp

Definition at line 40 of file ObjectResolutionCalc.h.

Constructor & Destructor Documentation

pat::ObjectResolutionCalc::ObjectResolutionCalc ( )

ObjectResolutionCalc::ObjectResolutionCalc	(	TString	resopath,
		bool	useNN = `false`
	)

Definition at line 12 of file ObjectResolutionCalc.cc.

References b, etaBin(), etaBinVals_, fResVsEt_, combine::key, relativeConstraints::keys, mergeVDriftHistosByStation::name, network_, NULL, AlCaHLTBitMon_ParallelJobs::p, resoFile_, tmp, and useNN_.

                                                                               : useNN_(useNN) {
   edm::LogVerbatim("ObjectResolutionCalc") << ("ObjectResolutionCalc") << "=== Constructing a TopObjectResolutionCalc...";
   resoFile_ = new TFile(resopath);
   if (!resoFile_) edm::LogError("ObjectResolutionCalc") << "No resolutions fits for this file available: "<<resopath<<"...";
   TString  resObsName[8] = {"_ares","_bres","_cres","_dres","_thres","_phres","_etres","_etares"};
   
   TList* keys = resoFile_->GetListOfKeys();
   TIter nextitem(keys);
   TKey* key = NULL;
   while((key = (TKey*)nextitem())) {
     TString name = key->GetName();
     if(useNN_) {
       for(Int_t ro=0; ro<8; ro++) {
         TString obsName = resObsName[ro]; obsName += "_NN";
         if(name.Contains(obsName)){
       network_[ro] = (TMultiLayerPerceptron*) resoFile_->GetKey(name)->ReadObj();
     }
       }
     }
     else 
     { 
       if(name.Contains("etabin") && (!name.Contains("etbin"))) {
         for(int p=0; p<8; p++){
           if(name.Contains(resObsName[p])){
             TString etabin = name; etabin.Remove(0,etabin.Index("_")+1); etabin.Remove(0,etabin.Index("_")+7);
             int etaBin = etabin.Atoi();
             TH1F *tmp = (TH1F*) (resoFile_->GetKey(name)->ReadObj());
             fResVsEt_[p][etaBin] = (TF1)(*(tmp -> GetFunction("F_"+name)));
       }
         }
       }
     }
   }
   // find etabin values
   TH1F *tmpEta = (TH1F*) (resoFile_->GetKey("hEtaBins")->ReadObj());
   for(int b=1; b<=tmpEta->GetNbinsX(); b++) etaBinVals_.push_back(tmpEta->GetXaxis()->GetBinLowEdge(b));
   etaBinVals_.push_back(tmpEta->GetXaxis()->GetBinUpEdge(tmpEta->GetNbinsX()));
   edm::LogVerbatim("ObjectResolutionCalc") << "Found "<<etaBinVals_.size()-1  << " eta-bins with edges: ( ";
   for(size_t u=0; u<etaBinVals_.size(); u++) edm::LogVerbatim("ObjectResolutionCalc") << etaBinVals_[u]<<", ";
   edm::LogVerbatim("ObjectResolutionCalc") << "\b\b )"<<std::endl;
   
   edm::LogVerbatim("ObjectResolutionCalc") << "=== done." << std::endl;
 }

ObjectResolutionCalc::~ObjectResolutionCalc ( )

Definition at line 58 of file ObjectResolutionCalc.cc.

References resoFile_.

                                             {
   delete resoFile_;
 }

Member Function Documentation

int ObjectResolutionCalc::etaBin ( float eta )

Definition at line 71 of file ObjectResolutionCalc.cc.

References newFWLiteAna::bin, etaBinVals_, and i.

Referenced by ObjectResolutionCalc().

                                           {
   int nrEtaBins = etaBinVals_.size()-1;
   int bin = nrEtaBins-1;
   for(int i=0; i<nrEtaBins; i++) {
     if(fabs(eta) > etaBinVals_[i] && fabs(eta) < etaBinVals_[i+1]) bin = i;
   }
   return bin;
 }

float ObjectResolutionCalc::obsRes	(	int	obs,
		int	eta,
		float	eT
	)

Definition at line 63 of file ObjectResolutionCalc.cc.

References eta(), edm::hlt::Exception, fResVsEt_, edm::errors::LogicError, and useNN_.

                                                              {
   if (useNN_) throw edm::Exception( edm::errors::LogicError, 
                                    "TopObjectResolutionCalc::obsRes should never be called when using a NN for resolutions." );
   float res = fResVsEt_[obs][eta].Eval(eT);
   return res;
 }