/data/refman/pasoursint/CMSSW_5_3_4/src/RecoParticleFlow/PFClusterTools/src/Exercises3.cc

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#include "RecoParticleFlow/PFClusterTools/interface/Exercises3.h"
#include "RecoParticleFlow/PFClusterTools/interface/PFToolsException.h"
#include "RecoParticleFlow/PFClusterTools/interface/TreeUtility.h"
#include "DataFormats/ParticleFlowReco/interface/Calibratable.h"
#include "RecoParticleFlow/PFClusterTools/interface/DetectorElement.h"
#include "RecoParticleFlow/PFClusterTools/interface/Calibrator.h"
#include "RecoParticleFlow/PFClusterTools/interface/LinearCalibrator.h"
#include "RecoParticleFlow/PFClusterTools/interface/SpaceManager.h"
#include "DataFormats/ParticleFlowReco/interface/CalibrationProvenance.h"
#include "RecoParticleFlow/PFClusterTools/interface/Region.h"
#include "RecoParticleFlow/PFClusterTools/interface/IO.h"

#include <TFile.h>
#include <TTree.h>
#include <TH3F.h>
#include <TF2.h>
#include <TH1F.h>
#include <TGraph.h>
#include <TF1.h>
#include <vector>
#include <TROOT.h>

using namespace pftools;

void resetElement3(DetectorElementPtr de) {
        de->setCalib(1.0);
}

Exercises3::~Exercises3() {
        calibResultsFile_.close();
}

Exercises3::Exercises3(IO* options) :
        withOffset_(false), target_(CLUSTER), threshold_(30), options_(options),
                        debug_(0) {

        options_->GetOpt("exercises", "withOffset", withOffset_);
        options_->GetOpt("exercises", "threshold", threshold_);
        options_->GetOpt("exercises", "debug", debug_);

        /* Initialise PFClusterCalibration appropriately. */
        double g0, g1, e0, e1;
        options_->GetOpt("correction", "globalP0", g0);
        options_->GetOpt("correction", "globalP1", g1);
        options_->GetOpt("correction", "lowEP0", e0);
        options_->GetOpt("correction", "lowEP1", e1);
        clusterCalibration_.setCorrections(e0, e1, g0, g1);

        double ecalECut, hcalECut;
        options_->GetOpt("evolution", "ecalECut", ecalECut);
        options_->GetOpt("evolution", "hcalECut", hcalECut);
        clusterCalibration_.setEcalHcalEnergyCuts(ecalECut, hcalECut);

        int allowNegative(0);
        options_->GetOpt("correction", "allowNegativeEnergy", allowNegative);
        clusterCalibration_.setAllowNegativeEnergy(allowNegative);

        int doCorrection(1);
        options_->GetOpt("correction", "doCorrection", doCorrection);
        clusterCalibration_.setDoCorrection(doCorrection);

        int doEtaCorrection(0);
        options_->GetOpt("correction", "doEtaCorrection", doEtaCorrection);
        clusterCalibration_.setDoEtaCorrection(doEtaCorrection);

        double barrelEta;
        options_->GetOpt("evolution", "barrelEndcapEtaDiv", barrelEta);
        clusterCalibration_.setBarrelBoundary(barrelEta);

        double maxEToCorrect(100.0);
        options_->GetOpt("correction", "maxEToCorrect", maxEToCorrect);
        clusterCalibration_.setMaxEToCorrect(maxEToCorrect);

        std::vector<std::string>* names = clusterCalibration_.getKnownSectorNames();
        for (std::vector<std::string>::iterator i = names->begin(); i
                        != names->end(); ++i) {
                std::string sector = *i;
                std::vector<double> params;
                options_->GetOpt("evolution", sector.c_str(), params);
                clusterCalibration_.setEvolutionParameters(sector, params);
        }

        std::vector<double> etaParams;
        options_->GetOpt("evolution", "etaCorrection", etaParams);
        clusterCalibration_.setEtaCorrectionParameters(etaParams);

        std::cout << clusterCalibration_ << "\n";

        std::string outputFileName;
        options_->GetOpt("results", "calibParamOutput", outputFileName);
        calibResultsFile_.open(outputFileName.c_str());
        calibResultsFile_ << "//Hello from your friendly PFClusterTools!\n";
        if (debug_ > 0)
                std::cout << __PRETTY_FUNCTION__ << ": finished.\n";

}

void Exercises3::calibrateCalibratables(TChain& sourceTree,
                const std::string& exercisefile) {

        if (debug_ > 0) {
                std::cout << "Welcome to "<< __PRETTY_FUNCTION__ << "\n";
                std::cout << "Opening TTree...\n";
        }
//      //open tfile
//      TFile* source = new TFile(sourcefile.c_str());
//      if (source == 0) {
//              std::string desc("Couldn't open file ");
//              desc += sourcefile;
//              PFToolsException e(desc);
//              throw e;
//      }
//      if (debug_ > 0)
//              std::cout << "Extracting calibratables...\n";
        //use tree utility to extract calibratables
        TreeUtility tu;
        std::vector<Calibratable> calibVec;

        tu.getCalibratablesFromRootFile(sourceTree, calibVec);
        if (debug_ > 0)
                std::cout << "Got a vector of calibratables of size "<< calibVec.size()
                                << "\n";
        //initialise detector elements
        DetectorElementPtr ecal(new DetectorElement(ECAL, 1.0));
        DetectorElementPtr hcal(new DetectorElement(HCAL, 1.0));
        DetectorElementPtr offset(new DetectorElement(OFFSET, 1.0));

        //convert calibratables to particle deposits
        std::vector<ParticleDepositPtr> pdVec;
        tu.convertCalibratablesToParticleDeposits(calibVec, pdVec, target_, offset,
                        ecal, hcal, withOffset_);
        //source->Close();

        TFile* exercises = new TFile(exercisefile.c_str(), "recreate");
        TH1F droppedParticles("droppedParticles", "droppedParticles", 100000, 0,
                        100000);
        if (debug_ > 0)
                std::cout << "Particle deposit vec has "<< pdVec.size() << " entries\n";

        //calibrate
        if (debug_ > 1)
                std::cout << "Creating calibrator clones and space managers\n";
        boost::shared_ptr<Calibrator> linCal(new LinearCalibrator());

        //Tell the calibrator which detector elements should be calibrated
        if (withOffset_) {
                linCal->addDetectorElement(offset);

        }
        linCal->addDetectorElement(ecal);
        linCal->addDetectorElement(hcal);

        double barrelEta;
        options_->GetOpt("evolution", "barrelEndcapEtaDiv", barrelEta);
        boost::shared_ptr<SpaceManager> sm(new SpaceManager("ecalAndHcal"));
        sm->setBarrelLimit(barrelEta);
        sm->createCalibrators(*linCal);

        if (debug_ > 1)
                std::cout << "Initialised SpaceManager and calibrators.\n";
        elements_.clear();
        if (withOffset_)
                elements_.push_back(offset);
        elements_.push_back(ecal);
        elements_.push_back(hcal);

        //Initialise calibrators with particles
        int dropped(0);

        double eCut(0.0);
        double hCut(0.0);
        options_->GetOpt("evolution", "ecalECut", eCut);
        options_->GetOpt("evolution", "hcalECut", hCut);
        if (debug_ > 0)
                std::cout << "Using a ECAL and HCAL energy cuts of "<< eCut << " and "
                                << hCut << " GeV\n";
        if (debug_ > 1)
                std::cout << "Assigning particles to space managers and calibrators.\n";

        //This is just a convenience plot to check on the hcal
        for (std::vector<ParticleDepositPtr>::const_iterator cit = pdVec.begin(); cit
                        != pdVec.end(); ++cit) {
                ParticleDepositPtr pd = *cit;
                CalibratorPtr c = sm->findCalibrator(pd->getEta(), pd->getPhi(),
                                pd->getTruthEnergy());
                //std::cout << *pd << "\n";
                if (c == 0) {
                        std::cout << "Couldn't find calibrator for particle?!\n";
                        std::cout << "\t"<< *pd << "\n";

                        dropped++;
                } else {
                        c->addParticleDeposit(pd);
                }

        }

        if (debug_ > 1)
                std::cout << "Dropped "<< dropped << " particles.\n";

        /* Done assignments, now calibrate */
        if (debug_ > 1)
                std::cout
                                << "Assignments complete, starting calibration and analysis.\n";

        //calibrate
        std::map<SpaceVoxelPtr, CalibratorPtr> * smCalibrators =
                        sm->getCalibrators();

        TTree tree("CalibratedParticles", "");
        Calibratable* calibrated = new Calibratable();
        tree.Branch("Calibratable", "pftools::Calibratable", &calibrated, 32000, 2);
        if (debug_ > 1)
                std::cout << "Initialised tree.\n";

        /* ECAL and HCAL */
        std::cout << "*** Performance for ECAL + HCAL calibration ***\n";
        getCalibrations(sm);
        exercises->cd("/");
        exercises->mkdir("ecalAndHcal");
        exercises->cd("/ecalAndHcal");
        evaluateSpaceManager(sm, elements_);
        for (std::map<SpaceVoxelPtr, CalibratorPtr>::iterator it =
                        smCalibrators->begin(); it != smCalibrators->end(); ++it) {
                SpaceVoxelPtr sv = (*it).first;
                CalibratorPtr c = (*it).second;
                std::for_each(elements_.begin(), elements_.end(), resetElement3);
                evaluateCalibrator(sm, c, tree, calibrated, ecal, hcal, offset, LINEAR,
                                LINEARCORR);

                std::for_each(elements_.begin(), elements_.end(), resetElement3);
        }
        sm->printCalibrations(std::cout);

        exercises->cd("/");

        //save results
        std::cout << "Writing output tree...\n";
        tree.Write();
        droppedParticles.Write();
        //gaussianFits(*exercises, calibVec);
        exercises->Write();
        exercises->Close();
        std::cout << "Done."<< std::endl;

}

void Exercises3::getCalibrations(SpaceManagerPtr s) {

        std::map<SpaceVoxelPtr, CalibratorPtr>* smCalibrators = s->getCalibrators();

        for (std::map<SpaceVoxelPtr, CalibratorPtr>::iterator it =
                        smCalibrators->begin(); it != smCalibrators->end(); ++it) {
                CalibratorPtr c= (*it).second;
                std::for_each(elements_.begin(), elements_.end(), resetElement3);
                if (c->hasParticles() > static_cast<int>(threshold_)) {
                        std::map<DetectorElementPtr, double> calibs =
                                        c->getCalibrationCoefficients();
                        s->assignCalibration(c, calibs);
                }
        }
}

void Exercises3::evaluateSpaceManager(SpaceManagerPtr s,
                std::vector<DetectorElementPtr> detEls) {

        int autoFit(0);
        options_->GetOpt("evolution", "autoFit", autoFit);
        std::cout << "AutoFit option = "<< autoFit << "\n";

        std::vector<double> ecalBarrel;
        std::vector<double> ecalEndcap;
        std::vector<double> hcalBarrel;
        std::vector<double> hcalEndcap;

        double minE, maxE;
        options_->GetOpt("evolution", "evolutionFunctionMinE", minE);
        options_->GetOpt("evolution", "evolutionFunctionMaxE", maxE);

        int basePlots(0);
        options_->GetOpt("evolution", "basePlots", basePlots);

        int useTruth(1);
        options_->GetOpt("evolution", "basePlotsUseTruth", useTruth);

        if (debug_ > 1&& basePlots > 0)
                std::cout << "Option to generate evolution plots invoked.\n";

        if (autoFit == 0) {
                std::cout << "Fixing parameters for evolution functions.\n";

                options_->GetOpt("evolution", "ecalHcalEcalBarrel", ecalBarrel);
                options_->GetOpt("evolution", "ecalHcalEcalEndcap", ecalEndcap);
                options_->GetOpt("evolution", "ecalHcalHcalBarrel", hcalBarrel);
                options_->GetOpt("evolution", "ecalHcalHcalEndcap", hcalEndcap);
                assert(ecalBarrel.size() == 6 && ecalEndcap.size() == 6);
                assert(hcalBarrel.size() == 6 && hcalEndcap.size() == 6);

                for (std::vector<DetectorElementPtr>::iterator i = detEls.begin(); i
                                != detEls.end(); ++i) {
                        DetectorElementPtr d = *i;
                        std::cout << "Fixing evolution for "<< *d << "\n";
                        int mode(0);
                        options_->GetOpt("spaceManager", "interpolationMode", mode);

                        std::string name("Func_");
                        name.append(DetElNames[d->getType()]);
                        name.append("_");

                        /* Fitting for barrel */
                        std::string barrelName(name);
                        barrelName.append(RegionNames[BARREL_POS]);
                        std::cout << "\tFixing "<< RegionNames[BARREL_POS]<< "\n";
                        TF1
                                        fBarrel(barrelName.c_str(),
                                                        "([0]*[5]*x)*([5]*x<[1])+([2]+[3]*exp([4]*[5]*x))*([5]*x>[1])");

                        if (d->getType() == ECAL) {
                                unsigned count(0);
                                for (std::vector<double>::const_iterator dit =
                                                ecalBarrel.begin(); dit!= ecalBarrel.end(); ++dit) {
                                        fBarrel.FixParameter(count, *dit);
                                        ++count;
                                }

                        }
                        if (d->getType() == HCAL) {
                                unsigned count(0);
                                for (std::vector<double>::const_iterator dit =
                                                hcalBarrel.begin(); dit!= hcalBarrel.end(); ++dit) {
                                        fBarrel.FixParameter(count, *dit);
                                        ++count;
                                }

                        }
                        if (useTruth)
                                fBarrel.FixParameter(5, 1.0);

                        fBarrel.SetMinimum(0);
                        s->addEvolution(d, BARREL_POS, fBarrel);

                        if (basePlots > 0) {
                                TH1* slices = s->extractEvolution(d, BARREL_POS, fBarrel,
                                                useTruth);
                                slices->Write();
                        }
                        fBarrel.Write();

                        /* Fitting for endcap */
                        std::string endcapName(name);
                        endcapName.append(RegionNames[ENDCAP_POS]);
                        std::cout << "\tFixing "<< RegionNames[ENDCAP_POS]<< "\n";
                        TF1
                                        fEndcap(endcapName.c_str(),
                                                        "([0]*[5]*x)*([5]*x<[1])+([2]+[3]*exp([4]*[5]*x))*([5]*x>[1])");
                        

                        if (d->getType() == ECAL) {
                                unsigned count(0);
                                for (std::vector<double>::const_iterator dit =
                                                ecalEndcap.begin(); dit!= ecalEndcap.end(); ++dit) {
                                        fEndcap.FixParameter(count, *dit);
                                        ++count;
                                }

                        }
                        if (d->getType() == HCAL) {
                                unsigned count(0);
                                for (std::vector<double>::const_iterator dit =
                                                hcalEndcap.begin(); dit!= hcalEndcap.end(); ++dit) {
                                        fEndcap.FixParameter(count, *dit);
                                        ++count;
                                }

                        }
                        if (useTruth)
                                fEndcap.FixParameter(5, 1.0);

                        fEndcap.SetMinimum(0);
                        s->addEvolution(d, ENDCAP_POS, fEndcap);
                        if (basePlots > 0) {
                                TH1* slices = s->extractEvolution(d, ENDCAP_POS, fEndcap,
                                                useTruth);
                                slices->Write();
                        }
                        fEndcap.Write();
                }

        }

}

void Exercises3::evaluateCalibrator(SpaceManagerPtr s, CalibratorPtr c,
                TTree& tree, Calibratable* calibrated, DetectorElementPtr ecal,
                DetectorElementPtr hcal, DetectorElementPtr offset,
                CalibrationProvenance cp, CalibrationProvenance cpCorr) {

        if (c->hasParticles() > static_cast<int>(threshold_)) {
                std::map<DetectorElementPtr, double> calibs = s->getCalibration(c);

                std::vector<ParticleDepositPtr> csParticles = c->getParticles();
                unsigned count(0);
                int mode(0);
                options_->GetOpt("spaceManager", "interpolationMode", mode);
                if (debug_ > 1) {
                        std::cout << "Using interpolation mode " << mode << "\n";
                }

                for (std::vector<ParticleDepositPtr>::iterator zit = csParticles.begin(); zit
                                != csParticles.end(); ++zit) {
                        ParticleDepositPtr pd = *zit;
                        calibrated->reset();
                        calibrated->rechits_meanEcal_.energy_ = pd->getRecEnergy(ecal);
                        calibrated->rechits_meanHcal_.energy_ = pd->getRecEnergy(hcal);
                        calibrated->sim_energyEvent_ = pd->getTruthEnergy();
                        calibrated->sim_etaEcal_ = pd->getEta();

                        for (std::map<DetectorElementPtr, double>::iterator deit =
                                        calibs.begin(); deit != calibs.end(); ++deit) {
                                DetectorElementPtr de = (*deit).first;
                                de->setCalib(1.0);
                        }

                        CalibrationResultWrapper crwPre;
                        crwPre.ecalEnergy_ = pd->getRecEnergy(ecal);
                        crwPre.hcalEnergy_ = pd->getRecEnergy(hcal);
                        crwPre.particleEnergy_ = pd->getRecEnergy();
                        crwPre.truthEnergy_ = pd->getTruthEnergy();
                        crwPre.provenance_ = UNCALIBRATED;
                        crwPre.targetFuncContrib_ = pd->getTargetFunctionContrib();
                        crwPre.target_ = target_;
                        crwPre.compute();
                        calibrated->calibrations_.push_back(crwPre);

                        double tempEnergy = pd->getRecEnergy();
                        //evaluate calibration
                        for (std::map<DetectorElementPtr, double>::iterator deit =
                                        calibs.begin(); deit != calibs.end(); ++deit) {
                                DetectorElementPtr de = (*deit).first;

                                if (mode == 1)
                                        de->setCalib(s->interpolateCoefficient(de,
                                                        pd->getTruthEnergy(), pd->getEta(), pd->getPhi()));
                                else if (mode == 2|| mode == 3|| mode == 4)
                                        de->setCalib(s->evolveCoefficient(de, tempEnergy,
                                                        pd->getEta(), pd->getPhi()));
                                else
                                        de->setCalib((*deit).second);
                        }
                        if (debug_ > 8) {
                                std::cout << "POST ECAL HCAL coeff: " << ecal->getCalib() << ", " << hcal->getCalib() << "\n";
                        }

                        CalibrationResultWrapper crwPos;
                        crwPos.ecalEnergy_ = pd->getRecEnergy(ecal);
                        crwPos.hcalEnergy_ = pd->getRecEnergy(hcal);
                        crwPos.b_ = ecal->getCalib();
                        crwPos.c_ = hcal->getCalib();
                        crwPos.particleEnergy_ = pd->getRecEnergy();
                        crwPos.truthEnergy_ = pd->getTruthEnergy();
                        crwPos.provenance_ = cp;
                        crwPos.compute();

                        crwPos.targetFuncContrib_ = pd->getTargetFunctionContrib();
                        crwPos.target_ = target_;
                        calibrated->calibrations_.push_back(crwPos);

                        //same again, but applying correction
                        if (cpCorr != NONE) {
                                CalibrationResultWrapper crwCorr;

                                crwCorr.ecalEnergy_
                                                = clusterCalibration_.getCalibratedEcalEnergy(
                                                                crwPre.ecalEnergy_, crwPre.hcalEnergy_,
                                                                pd->getEta(), pd->getPhi());
                                crwCorr.hcalEnergy_
                                                = clusterCalibration_.getCalibratedHcalEnergy(
                                                                crwPre.ecalEnergy_, crwPre.hcalEnergy_,
                                                                pd->getEta(), pd->getPhi());
                                if (debug_ > 8) {
                                        if(crwPre.ecalEnergy_  > 0 && crwPre.hcalEnergy_ >0)
                                        std::cout << "CORR ECAL HCAL coeff: " << crwCorr.ecalEnergy_ / crwPre.ecalEnergy_  << ", " << crwCorr.hcalEnergy_/ crwPre.hcalEnergy_ << "\n\n";
                                }

                                crwCorr.particleEnergy_
                                                = clusterCalibration_.getCalibratedEnergy(
                                                                crwPre.ecalEnergy_, crwPre.hcalEnergy_,
                                                                pd->getEta(), pd->getPhi());

                                crwCorr.b_ = ecal->getCalib();
                                crwCorr.c_ = hcal->getCalib();

                                crwCorr.truthEnergy_ = pd->getTruthEnergy();
                                crwCorr.provenance_ = cpCorr;
                                crwCorr.targetFuncContrib_ = pd->getTargetFunctionContrib();
                                crwCorr.target_ = target_;
                                crwCorr.compute();
                                calibrated->calibrations_.push_back(crwCorr);

                                crwPos.targetFuncContrib_ = pd->getTargetFunctionContrib();
                                crwPos.target_ = target_;
                                calibrated->calibrations_.push_back(crwPos);
                        }
                        tree.Fill();
                        ++count;

                }
        }
}