EIC code displayed by LXR master/​detector_benchmarks/​benchmarks/​barrel_ecal/​scripts/​emcal_barrel_pion_rejection_analysis.cxx	Source navigation Diff markup Identifier search General search
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File indexing completed on 2026-09-16 08:25:21

 ////////////////////////////////////////
 // Read reconstruction ROOT output file
 // Plot variables
 ////////////////////////////////////////
 
 #include "ROOT/RDataFrame.hxx"
 #include <iostream>
 #include <algorithm>
 #include <string>
 
 #include "edm4hep/MCParticleCollection.h"
 #include "edm4hep/SimCalorimeterHitCollection.h"
 
 #include <boost/range/combine.hpp>
 
 #include "DD4hep/IDDescriptor.h"
 #include "DD4hep/Readout.h"
 #include "DD4hep/Segmentations.h"
 
 #include "TCanvas.h"
 #include "TStyle.h"
 #include "TMath.h"
 #include "TH1.h"
 #include "TF1.h"
 #include "TH1D.h"
 #include "TFitResult.h"
 #include "TLegend.h"
 #include "TString.h"
 #include "TGraph.h"
 #include "TGraph2D.h"
 #include "TGraphErrors.h"
 #include "TLine.h"
 #include "TError.h"
 
 R__LOAD_LIBRARY(libfmt.so)
 #include "fmt/core.h"
 #include "DD4hep/Detector.h"
 #include "DDG4/Geant4Data.h"
 #include "DDRec/CellIDPositionConverter.h"
 #include "emcal_barrel_common_functions.h"
 
 using ROOT::RDataFrame;
 using namespace ROOT::VecOps;
 
 void emcal_barrel_pion_rejection_analysis(
                                           const char* input_fname1 = "sim_output/sim_emcal_barrel_piRej_electron.edm4hep.root",
                                           const char* input_fname2 = "sim_output/sim_emcal_barrel_piRej_piminus.edm4hep.root"
                                           )
 {
   // Error Ignore Level Set
   gErrorIgnoreLevel = kFatal;
 
   // Setting for graphs
   gROOT->SetStyle("Plain");
   gStyle->SetOptFit(1);
   gStyle->SetLineWidth(2);
   gStyle->SetPadTickX(1);
   gStyle->SetPadTickY(1);
   gStyle->SetPadGridX(1);
   gStyle->SetPadGridY(1);
   gStyle->SetPadLeftMargin(0.14);
   gStyle->SetPadRightMargin(0.14);
 
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame d0("events", {input_fname1, input_fname2});
 
   // Script requires EcalBarrelScFiHits
   if (! d0.HasColumn("EcalBarrelScFiHits")) {
     std::cout << "EcalBarrelScFiHits is required" << std::endl;
     return;
   }
 
   // Environment Variables
   std::string detector_path = "";
   std::string detector_name = "athena";//athena
   if(std::getenv("DETECTOR_PATH")) {
     detector_path = std::getenv("DETECTOR_PATH");
   }
   if(std::getenv("DETECTOR_CONFIG")) {
     detector_name = std::getenv("DETECTOR_CONFIG");
   }
 
   /*
   // Sampling Fraction grabbed from json file
   json j;
   std::ifstream prev_steps_ifstream("results/emcal_barrel_electron_calibration.json");
   prev_steps_ifstream >> j;
 
   // Sampling Fraction
   double samp_frac = j["electron"]["sampling_fraction"];
   */
 
   // Detector Layer Variables
   int layerNum; 
   int dep_min = 1;
   int dep_max = 6;
 
   // DD4HEP interface 
   dd4hep::Detector& detector = dd4hep::Detector::getInstance();
   detector.fromCompact(fmt::format("{}/{}.xml", detector_path, detector_name));
 
   auto decoder         = detector.readout("EcalBarrelImagingHits").idSpec().decoder();
   auto decoderScFi     = detector.readout("EcalBarrelScFiHits").idSpec().decoder();
   auto layer_index     = decoder->index("layer");
   auto layer_indexScFi = decoderScFi->index("layer");
 
   // Thrown Energy [GeV]
   auto Ethr = [](std::vector<edm4hep::MCParticleData> const& input) {
     return TMath::Sqrt(input[2].momentum.x*input[2].momentum.x + input[2].momentum.y*input[2].momentum.y + input[2].momentum.z*input[2].momentum.z + input[2].mass*input[2].mass);
   };
 
   // Thrown Momentum [GeV]
   auto Pthr = [](std::vector<edm4hep::MCParticleData> const& input) {
     return TMath::Sqrt(input[2].momentum.x*input[2].momentum.x + input[2].momentum.y*input[2].momentum.y + input[2].momentum.z*input[2].momentum.z);
   };
 
   // Thrown Eta 
   auto Eta = [](std::vector<edm4hep::MCParticleData> const& input) {
     double E  = TMath::Sqrt(input[2].momentum.x*input[2].momentum.x + input[2].momentum.y*input[2].momentum.y + input[2].momentum.z*input[2].momentum.z + input[2].mass*input[2].mass);
     return 0.5*TMath::Log((E + input[2].momentum.z) / (E - input[2].momentum.z));
   };
 
   // Thrown pT [GeV]
   auto pT = [](std::vector<edm4hep::MCParticleData> const& input) {
     return TMath::Sqrt(input[2].momentum.x*input[2].momentum.x + input[2].momentum.y*input[2].momentum.y);
   };
 
   // Number of hits
   auto nhits = [] (const std::vector<edm4hep::SimCalorimeterHitData>& evt) {return (int) evt.size(); };
 
   // Energy deposition [GeV]
   auto Esim = [](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     double total_edep = 0.0;
     for (const auto& i: evt){
       total_edep += i.energy;
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV] in the first 2 layers
   auto Esim_dep2 = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoder->get(i.cellID, layer_index) < 3 ){
         total_edep += i.energy;
       }
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV] in the first 3 layers
   // Same as Esim_front from previous codes
   auto Esim_dep3 = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoder->get(i.cellID, layer_index) < 4 ){
         total_edep += i.energy;
       }
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV] in the first 4 layers
   auto Esim_dep4 = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoder->get(i.cellID, layer_index) < 5 ){
         total_edep += i.energy;
       }
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV] in the first 5 layers
   auto Esim_dep5 = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoder->get(i.cellID, layer_index) < 6 ){
         total_edep += i.energy;
       }
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV] in the first 6 layers
   auto Esim_dep6 = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoder->get(i.cellID, layer_index) < 7 ){
         total_edep += i.energy;
       }
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV] in the first 6 layers
   auto Esim_dep6_ScFi = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoderScFi->get(i.cellID, layer_indexScFi) < 7 ){
         total_edep += i.energy;
       } 
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV] in the first 7 layers
   auto Esim_dep7 = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoder->get(i.cellID, layer_index) < 8 ){
         total_edep += i.energy;
       }
     }
     return total_edep;
   };
     // Energy deposititon [GeV] in the first 8 layers
   auto Esim_dep8 = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoder->get(i.cellID, layer_index) < 9 ){
         total_edep += i.energy;
       }
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV] in the first 9 layers
   auto Esim_dep9 = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     auto total_edep = 0.0;
     for (const auto& i: evt) {
       if( decoder->get(i.cellID, layer_index) < 10 ){
         total_edep += i.energy;
       }
     }
     return total_edep;
   };
 
   // Energy deposititon [GeV], returns array
   // Note Layer_index = 0 does not exist at the wrting of this code
   auto Esim_dep = [=](const std::vector<edm4hep::SimCalorimeterHitData>& evt) {
     std::vector<double>res(20);
     for (const auto& i: evt) {
       res[decoder->get(i.cellID, layer_index)] += i.energy;
     }
     return res;
   };
 
   // Sum of Energy deposititon [GeV]
   auto Esim_dep_sum = [&dep_min, &dep_max](const std::vector<double>& dep) {
     double res = 0;
     for (int i = dep_min; i < dep_max + 1; i++) {
       if (i >= dep.size()) continue;
       res += dep[i];
     }
     return res;
   };
 
   // Energy deposititon in a layer [GeV]
   auto Esim_depN = [&layerNum](const std::vector<double>& dep) {
     return (layerNum < dep.size() ? dep[layerNum] : 0.0);
   };
 
   // Sampling fraction = Esampling / Ethrown
   auto fsam = [](const double& sampled, const double& thrown) {
     return sampled / thrown;
   };
 
   // E_front / p
   auto fEp = [](const double& E_front, const double& mom) {
     return E_front / mom;
   };
 
   // Returns the PDG of the particle
   auto getpid = [](std::vector<edm4hep::MCParticleData> const& input) {
     return input[2].PDG;
   };
 
   // Returns number of particle daughters
   auto getdau = [](std::vector<edm4hep::MCParticleData> const& input){
     return input[2].daughters_begin;
   };
 
   // Filter function to get electrons
   auto is_electron = [](std::vector<edm4hep::MCParticleData> const& input){
     return (input[2].PDG == 11 ? true : false);
   };
 
   // Filter function to get just negative pions
   auto is_piMinus = [](std::vector<edm4hep::MCParticleData> const& input){
     return (input[2].PDG == -211 ? true : false);
   };
 
   // Filter function Edeposit
   auto EDep_bool = [](std::vector<double> const& input){
     return (input[0] > input[1]);
   };
 
   auto Diff = [](const double &esim, const double &edep){
     return esim-edep;
   };
 
 
   // Define variables
   auto d1 = d0.Define("Ethr",            Ethr,                  {"MCParticles"})
               .Define("Pthr",            Pthr,                  {"MCParticles"})
               .Define("nhits",           nhits,                 {"EcalBarrelImagingHits"})
               .Define("Esim",            Esim,                  {"EcalBarrelImagingHits"})
               .Define("EsimScFi",        Esim,                  {"EcalBarrelScFiHits"})
               .Define("EsimOverP",       fEp,                   {"Esim", "Pthr"})
               .Define("EsimScFiOverP",   fEp,                   {"EsimScFi", "Pthr"})
               .Define("EsimTot",                                "EsimScFi+Esim")
               .Define("EsimTotOverP",    fEp,                   {"EsimTot", "Pthr"})
               .Define("fsam",            fsam,                  {"Esim","Ethr"})
               .Define("pid",             getpid,                {"MCParticles"})
               .Define("EDep",            Esim_dep,              {"EcalBarrelImagingHits"})
               .Define("EDepSum",         Esim_dep_sum,          {"EDep"})
               .Define("EDepN",           Esim_depN,             {"EDep"})
               .Define("EDep2",           Esim_dep2,             {"EcalBarrelImagingHits"})
               .Define("EDep3",           Esim_dep3,             {"EcalBarrelImagingHits"})
               .Define("EDep4",           Esim_dep4,             {"EcalBarrelImagingHits"})
               .Define("EDep5",           Esim_dep5,             {"EcalBarrelImagingHits"})
               .Define("EDep6",           Esim_dep6,             {"EcalBarrelImagingHits"})
               .Define("EDep6OverP",      fEp,                   {"EDep6", "Pthr"})
               .Define("EOverP",          fEp,                   {"EDep3", "Pthr"})
               .Define("Eta",             Eta,                   {"MCParticles"})
               .Define("pT",              pT,                    {"MCParticles"})
               .Define("EDepOverP",       fEp,                   {"EDepN", "Pthr"})
               .Define("EDepOverPT",      fEp,                   {"EDepN", "pT"})
               .Define("EDepSumOverP",    fEp,                   {"EDepSum", "Pthr"})
               .Define("EDepSumOverPT",   fEp,                   {"EDepSum", "pT"})
               .Define("EDepFrac",        fEp,                   {"EDepSum", "Esim"})
               ;
   
   // Particle Filters
   dep_min = 1;
   dep_max = 6;
   auto d_ele = d1.Filter(is_electron, {"MCParticles"});
   auto d_pim = d1.Filter(is_piMinus,  {"MCParticles"});
 
   // Cut Filter
   std::string currentCut = "(EDep6OverP>2.5e-3)&&(EDep6>5e-3)";// Good athena cut, that is changed by cutEE later
 
   // Generic 1D Histogram Plots Comparing Electons and Pions w/o cuts
   // Edep first 6 layers(EDep6), EDep/p, pT, eta
   std::vector<std::string> var              = {"Esim [GeV];", "EsimTot [GeV];", "EDep6 [GeV];", "EDep6/p;",     "pT [GeV];", "#eta;",  "EsimScFi [GeV]",  "EsimScFi/p"};
   std::vector<std::string> var_save         = {"Esim",        "EsimTot",        "EDep6",        "EDep6OverP",   "pT",        "eta",    "EsimScFi",        "EsimScFiOverP"};  
   std::vector<std::string> col              = {"Esim",        "EsimTot",        "EDep6",        "EDep6OverP",   "pT",        "Eta",    "EsimScFi",        "EsimScFiOverP"};
   std::vector<std::vector<double>> h1Ranges = {{0,0.2},       {0, 0.2},         {0,0.25},       {0, 0.02},      {0, 18},     {-1, 1},  {0,0.2},            {0,0.2}};
   for (int i = 0; i < var.size(); i++){
     std::string title = "#pi^{-}, e^{-};" + var[i] + " Events";
     auto he = d_ele.Histo1D({"he", title.c_str(), 100, h1Ranges[i][0], h1Ranges[i][1]}, col[i]);
     auto hp = d_pim.Histo1D({"hp", title.c_str(), 100, h1Ranges[i][0], h1Ranges[i][1]}, col[i]);
 
     hp->GetYaxis()->SetTitleOffset(1.4);
     he->SetLineWidth(2);
     he->SetLineColor(kRed);
     hp->SetLineWidth(2);
     hp->SetLineColor(kBlue);
     auto c = new TCanvas("c", "c", 700, 500);
     auto leng = new TLegend(0.7, 0.7, 0.9, 0.9);
     if (var[i] != "EsimScFi/p"){ 
       hp->DrawClone();
       he->DrawClone("same");
     }
     else {
       he->DrawClone();
       hp->DrawClone("same");
     }
     c->Update();
 
     leng->AddEntry(he.GetPtr(),"e^{-}","l");
     leng->AddEntry(hp.GetPtr(),"#pi^{-}","l");
     leng->Draw();
     c->SaveAs(("results/emcal_barrel_pion_rej_uncut_comb_" + var_save[i] + ".png").c_str());
   }
 
   // Cut Generation
   // The cut breaks the Energy range in to three energy bins (EBins) and the two barrel eta bins (-1 to 0, and 0 to 1)
   // Then fits a gaussian within the range
   // The cut is then based upon Mean -2*StdDev < Mean < 3*StdDev
   std::string cutEEta;
   std::vector<std::vector<double>> EBins = {{0,2}, {2, 4}, {4, 6}, {6, 9}, {9, 12}, {12, 19}};
   for (int i = 0; i < EBins.size(); i++){
     std::string minCut = "Pthr>="+std::to_string(EBins[i][0]);
     std::string maxCut = "Pthr<"+std::to_string(EBins[i][1]);
     cutEEta += "(" + minCut + "&&" + maxCut + "&&";
     
     for (int j = -1; j < 1; j++){
       std::string title = "#pi^{-}, e^{-}";
       title += fmt::format(" : {} < E < {}", EBins[i][0], EBins[i][1]);
       title += fmt::format(" & {} < #eta < {};EDep6/p; Events", j, j+1);
       std::string etaCutMin = fmt::format("Eta>={}", j);
       std::string etaCutMax = fmt::format("Eta<{}",j+1);
       cutEEta += "(" + etaCutMin + "&&" + etaCutMax;
       auto he = d_ele.Filter(minCut).Filter(maxCut).Filter(etaCutMin).Filter(etaCutMax).Histo1D({"he", title.c_str(), 50, 0, 0.02}, "EDep6OverP");
       auto hp = d_pim.Filter(minCut).Filter(maxCut).Filter(etaCutMin).Filter(etaCutMax).Histo1D({"hp", title.c_str(), 50, 0, 0.02}, "EDep6OverP");
       auto hecopy = he->DrawCopy();
       hecopy->Fit("gaus", "", "", 0, hecopy->GetMaximum());
       TF1* gaus = hecopy->GetFunction("gaus");
       if (gaus != nullptr) {
         double* res = gaus->GetParameters();
         cutEEta += fmt::format("&&EDep6OverP>={}", res[1] - 2.0*res[2]);
         cutEEta += fmt::format("&&EDep6OverP<{})||",res[1] + 3.0*res[2]);
       } else {
         cutEEta += ")||"; // Close the eta condition without EDep6OverP
         std::cerr << "Warning: Gaussian fit failed for E bin " << i << ", eta bin " << j << std::endl;
       }
 
       hp->GetYaxis()->SetTitleOffset(1.4);
       he->SetLineWidth(2);
       he->SetLineColor(kRed);
       hp->SetLineWidth(2);
       hp->SetLineColor(kBlue);
       auto c = new TCanvas("c", "c", 700, 500);
       auto leng = new TLegend(0.7, 0.7, 0.9, 0.9);
       hp->DrawClone();
       he->DrawClone("same");
       c->Update();
 
       leng->AddEntry(he.GetPtr(),"e^{-}","l");
       leng->AddEntry(hp.GetPtr(),"#pi^{-}","l");
       leng->Draw();
       c->SaveAs((fmt::format("results/emcal_barrel_pion_rej_uncut_comb_E{}Eta{}.png", i, j+1)).c_str());
     }
     cutEEta.pop_back();
     cutEEta.pop_back();
     cutEEta += ")||";
   }
   cutEEta.pop_back();
   cutEEta.pop_back();
   currentCut = cutEEta;
 
   // Filtered dataframes
   auto d_pim_cut = d_pim.Filter(currentCut.c_str());
   auto d_ele_cut = d_ele.Filter(currentCut.c_str());
 
   // Gathering benchmarks and plotting distrubutions
   std::vector<double> E                 = {5, 10, 18};
   std::vector<double> ledges5           = {2.8, 0.4, 0.3, 0.5};
   std::vector<double> ledges10          = {1.4, 0.5, 0.6, 1.0};
   std::vector<double> ledges18          = {0.9, 0.9, 1.0, 1.8};
   std::vector<double> maxRate5          = {0.1, 100, 500, 1000};
   std::vector<double> maxRate10         = {10, 400, 800, 1000};
   std::vector<double> maxRate18         = {200, 800, 1000, 100};
   std::vector<vector<double>> maxRate   = {maxRate5, maxRate10, maxRate18};
   std::vector<vector<double>> lowEdges  = {ledges5, ledges10, ledges18};
   double suppression                    = 1e-4;
   std::vector<vector<double>> rejRatios = lowEdges;
   std::vector<vector<double>> effEle    = lowEdges;
   std::vector<vector<double>> effPim    = lowEdges;
   std::vector<std::string> etaBin       = {"Eta >= -3.5 && Eta < -2.0", "Eta >= -2.0 && Eta < -1.0", "Eta >= -1.0 && Eta < 0", "Eta >= 0 && Eta < 1.0"};
   std::vector<std::string> etaTitle     = {"-3.5 < #eta < -2.0", "-2.0 < #eta < -1.0", "-1.0 < #eta < 0", "0 < #eta < 1.0"};
 
   // Pion Rejection Plot that mimics that of the one in the image
   std::vector<double> pBins  = {0.1,0.2,0.3,0.4,0.5,1,2,3,4,5,10,12,14,16,18};
   EBins = {{0,2}, {2, 4}, {4, 6}, {6, 9}, {9, 12}, {12, 19}};
   auto tg = new TGraphErrors();
 
   for (int i = 0; i < EBins.size(); i++){
     std::string filter = currentCut;
     filter += "&&(Pthr>=" + std::to_string(EBins[i][0]) + "&&Pthr<" + std::to_string(EBins[i][1]) + ")";
     double numer = (double)*d_ele_cut.Filter(filter.c_str()).Count();
     double denom = (double)*d_pim_cut.Filter(filter.c_str()).Count();
     double error = std::sqrt(std::pow(numer / denom, 2.0)*(1.0/numer + 1.0/denom));
     double ratio = numer / denom;
     if (denom == 0){ratio = 1; error = 1;}
     tg->SetPoint(i, 0.5*(EBins[i][0] + EBins[i][1]), ratio);
     tg->SetPointError(i, 0.5*(EBins[i][1] - EBins[i][0]), error);
   }
   double e_eff = (double)*d_ele_cut.Count() / (double)*d_ele.Count();
   tg->SetTitle(("#pi Rejection with #varepsilon_{e} = "+ std::to_string(e_eff)).c_str());
   tg->GetXaxis()->SetTitle("p [GeV]");
   tg->GetYaxis()->SetTitle("R_{e/#pi}");
   tg->SetMarkerColor(kBlue);
   tg->SetMarkerStyle(20);
 
   auto cp = new TCanvas("cp", "cp");
   cp->SetLogy();
   cp->SetLogx();
   tg->DrawClone("ap");
   cp->SaveAs("results/emcal_barrel_pion_rej_RatioRej.png");
 
   // Barrel eta cuts
   // The eta range for the barrel is -1 < eta < 1
   // Threfore the first bins are empty and will not be iterated over
   dep_min = 1;
   dep_max = 6;
   for (int i = 0; i < 3; i++){   // E loop
     for (int j = 2; j < 4; j++){ // Eta Looop
       
       // Apply eta cuts/binning and Momentum Cut
       std::string pCut = "Pthr>=" + std::to_string(lowEdges[i][j]) + "&&Pthr<" + std::to_string(E[i]);
       auto e_eta = d_ele.Filter(etaBin[j]).Filter(pCut);
       auto p_eta = d_pim.Filter(etaBin[j]).Filter(pCut);
       
       // Print out the momentum distributions for the electron and pi-
       std::string title = "e^{-} (E = " + std::to_string((int)E[i]) + " GeV) : " + etaTitle[j] + "; p [GeV]; Events";
       auto he = e_eta.Histo1D({"he", title.c_str(), 100, lowEdges[i][j], E[i]}, "Pthr");
       he->SetLineColor(kBlue);
       auto he_cut = e_eta.Filter(currentCut).Histo1D({"he_cut", title.c_str(), 100, lowEdges[i][j], E[i]}, "Pthr");
       he_cut->GetYaxis()->SetTitleOffset(1.4);
       he_cut->SetLineWidth(2);
       he_cut->SetLineColor(kRed);
 
       title = "#pi^{-} (E = " + std::to_string((int)E[i]) + " GeV) : " + etaTitle[j] + "; p [GeV]; Events";
       auto hp = p_eta.Histo1D({"hp", title.c_str(), 100, lowEdges[i][j], E[i]}, "Pthr");
       hp->SetLineColor(kBlue);
       auto hp_cut = p_eta.Filter(currentCut).Histo1D({"hp", title.c_str(), 100, lowEdges[i][j], E[i]}, "Pthr");
       hp_cut->GetYaxis()->SetTitleOffset(1.4);
       hp_cut->SetLineWidth(2);
       hp_cut->SetLineColor(kRed);
 
       auto c = new TCanvas("c", "c", 700, 500);
       c->SetLogy(1);
       he->DrawClone();
       he_cut->DrawClone("same");
       c->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_mom_ele_E{}_eta{}.png", (int)E[i], j)).c_str());
       c->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_mom_ele_E{}_eta{}.pdf", (int)E[i], j)).c_str());
       c->Clear();
 
       hp->DrawClone();
       hp_cut->DrawClone("same");
       c->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_mom_pim_E{}_eta{}.png", (int)E[i], j)).c_str());
       c->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_mom_pim_E{}_eta{}.pdf", (int)E[i], j)).c_str());
       c->Clear();
 
       // Gather ratio of pi/e and efficiencies for each Energy and eta bin
       // Then plot the distributions
       rejRatios[i][j] = (double)hp_cut->Integral() / (double)he_cut->Integral();
       effPim[i][j]    = (double)hp_cut->Integral() / (double)hp->Integral();
       effEle[i][j]    = (double)he_cut->Integral() / (double)he->Integral();
 
       hp_cut->Divide(he.GetPtr());
       title = "#pi^{-}/e^{-} (E = " + std::to_string((int)E[i]) + " GeV) : " + etaTitle[j];
       hp_cut->SetTitle(title.c_str());
       hp_cut->SetLineColor(kBlack);
       hp_cut->DrawClone();
       c->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_ratio_pim_E{}_eta{}.png", (int)E[i], j)).c_str());
       c->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_ratio_pim_E{}_eta{}.pdf", (int)E[i], j)).c_str());
       c->Clear();
       
       // Print out the 1D distributions for the electron and pi- within the current Eta bin
       std::vector<std::string> endStr           = {";pT [GeV]; Events", ";EDep6/p; Events"};
       std::vector<std::string> var_save_loc     = {"pT",                "EDep6OverP"};  
       std::vector<std::string> col_loc          = {"pT",                "EDep6OverP"};
       std::vector<std::vector<double>> h1Ranges = {{0, E[i]},           {0, 0.02}};
       for (int k = 0; k < 2; k++){
         auto cl = new TCanvas("cl", "cl", 700, 500);
         title = "e^{-} (E = " + std::to_string((int)E[i]) + " GeV) : " + etaTitle[j] + endStr[k];
         auto he1 = e_eta.Histo1D({"he", title.c_str(), 100, h1Ranges[k][0], h1Ranges[k][1]}, col_loc[k]);
         he1->SetLineColor(kBlue);
         auto he1_cut = e_eta.Filter(currentCut).Histo1D({"he_cut", title.c_str(), 100, h1Ranges[k][0], h1Ranges[k][1]}, col_loc[k]);
         he1_cut->GetYaxis()->SetTitleOffset(1.4);
         he1_cut->SetLineWidth(2);
         he1_cut->SetLineColor(kRed);
 
         title = "#pi^{-} (E = " + std::to_string((int)E[i]) + " GeV) : " + etaTitle[j] + endStr[k];
         auto hp1 = p_eta.Histo1D({"hp", title.c_str(), 100, h1Ranges[k][0], h1Ranges[k][1]}, col_loc[k]);
         hp1->SetLineColor(kBlue);
         auto hp1_cut = p_eta.Filter(currentCut).Histo1D({"hp_cut", title.c_str(), 100, h1Ranges[k][0], h1Ranges[k][1]}, col_loc[k]);
         hp1_cut->GetYaxis()->SetTitleOffset(1.4);
         hp1_cut->SetLineWidth(2);
         hp1_cut->SetLineColor(kRed);
 
         cl->SetLogy(1);
         he1->DrawClone();
         he1_cut->DrawClone("same");
         cl->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_{}_ele_E{}_eta{}.png", col_loc[k], (int)E[i], j)).c_str());
         cl->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_{}_ele_E{}_eta{}.pdf", col_loc[k], (int)E[i], j)).c_str());
         cl->Clear();
 
         hp1->DrawClone();
         hp1_cut->DrawClone("same");
         cl->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_{}_pim_E{}_eta{}.png", col_loc[k], (int)E[i], j)).c_str());
         cl->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_{}_pim_E{}_eta{}.pdf", col_loc[k], (int)E[i], j)).c_str());
         cl->Clear();
 
         // Combined plots
         title = "#pi^{-}, e^{-} (E = " + std::to_string((int)E[i]) + " GeV) : " + etaTitle[j] + endStr[k];
         hp1_cut->SetLineColor(kBlue);
         he1_cut->SetLineColor(kRed);
         he1_cut->SetTitle(title.c_str());
 
         auto leng = new TLegend(0.7, 0.7, 0.9, 0.9);
         he1_cut->DrawClone();
         hp1_cut->DrawClone("same");
         cl->Update();
 
         leng->AddEntry(he1_cut.GetPtr(),"e^{-}","l");
         leng->AddEntry(hp1_cut.GetPtr(),"#pi^{-}","l");
         leng->Draw();
         cl->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_{}_comb_E{}_eta{}.png", col_loc[k], (int)E[i], j)).c_str());
         cl->SaveAs((fmt::format("results/emcal_barrel_pion_rej_cut_{}_comb_E{}_eta{}.pdf", col_loc[k], (int)E[i], j)).c_str());
 
       }// Generic 1d loop
     }// Eta Loop
   }// E loop
 
   // Writing out benchmarks
   //Tests
   std::string test_tag = "Barrel_emcal_pion_rejection";
   //TODO: Change test_tag to something else
   std:string detectorEle = "Barrel_emcal";
   
   for (int i = 0; i < etaTitle.size(); i++){
     etaTitle[i].erase(std::remove(etaTitle[i].begin(), etaTitle[i].end(), '#'), etaTitle[i].end());
     std::replace(etaTitle[i].begin(), etaTitle[i].end(), 'e', 'E');    
   }
   
   // E, Eta = 18, 2
   // Pion rejection analysis complete - results stored in rejection ratios and efficiencies
   std::cout << fmt::format("Pion rejection E={}, Eta=2: rejection ratio = {}\n", (int)E[0], rejRatios[0][2]);
   std::cout << fmt::format("Pion rejection E={}, Eta=3: rejection ratio = {}\n", (int)E[0], rejRatios[0][3]);
   std::cout << fmt::format("Pion rejection E={}, Eta=2: rejection ratio = {}\n", (int)E[1], rejRatios[1][2]);
   std::cout << fmt::format("Pion rejection E={}, Eta=3: rejection ratio = {}\n", (int)E[1], rejRatios[1][3]);
   std::cout << fmt::format("Pion rejection E={}, Eta=2: rejection ratio = {}\n", (int)E[2], rejRatios[2][2]);
   std::cout << fmt::format("Pion rejection E={}, Eta=3: rejection ratio = {}\n", (int)E[2], rejRatios[2][3]);
 }

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