Resolve "pi0 resolution for ECal barrel"

Closes #19 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -9,9 +9,9 @@
 #include "dd4pod/Geant4ParticleCollection.h"
 #include "dd4pod/CalorimeterHitCollection.h"
 
-#include <detector_benchmarks/include/benchmark.h>
-#include <mt.h>
-#include <util.h>
+//#include <detector_benchmarks/include/benchmark.h>
+//#include "mt.h"
+//#include "util.h"
 
 #include "TCanvas.h"
 #include "TStyle.h"
@@ -19,6 +19,9 @@
 #include "TH1.h"
 #include "TF1.h"
 #include "TH1D.h"
+#include <TFitResult.h>
+#include "TSystem.h"
+#include <fstream>
 
 using ROOT::RDataFrame;
 using namespace ROOT::VecOps;
@@ -50,8 +53,17 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
        {"quantity", "resolution (in %)"},
        {"target", std::to_string(resolutionTarget)}}};
 */
+
   ROOT::EnableImplicitMT();
   ROOT::RDataFrame d0("events", input_fname);
+/*
+  auto colNames = d0.GetColumnNames();
+
+  ofstream out;
+  out.open("results/column_list.txt");
+  for (auto &&col : colNames){out << col << endl; cout << col << endl;}
+  out.close();
+  */
 
   // Thrown Energy [GeV]
   auto Ethr = [](std::vector<dd4pod::Geant4ParticleData> const& input) {
@@ -83,13 +95,47 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
     return result;
   };
 
+  // Sampling fraction = Esampling / Ethrown, revised
+  auto fsam2 = [](const std::vector<double>& sampled, const std::vector<double>& thrown) {
+    std::vector<double> result;
+    auto it_sam = sampled.cbegin();
+    auto it_thr = thrown.cbegin();
+    for (; it_sam != sampled.end() && it_thr != thrown.end(); ++it_sam, ++it_thr) {
+        result.push_back(*it_sam / *it_thr);
+    }
+    return result;
+  };
+
+  // Energy Resolution = Esampling - Ethrown
+  auto eResol = [](const std::vector<double>& sampled, const std::vector<double>& thrown) {
+    std::vector<double> result;
+    auto it_sam = sampled.cbegin();
+    auto it_thr = thrown.cbegin();
+    for (; it_sam != sampled.end() && it_thr != thrown.end(); ++it_sam, ++it_thr) {
+        result.push_back(*it_sam - *it_thr);
+    }
+    return result;
+  };
+
+  // Relative Energy Resolution = (Esampling - Ethrown)/Ethrownnnn
+  auto eResol_rel = [](const std::vector<double>& sampled, const std::vector<double>& thrown) {
+    std::vector<double> result;
+    auto it_sam = sampled.cbegin();
+    auto it_thr = thrown.cbegin();
+    for (; it_sam != sampled.end() && it_thr != thrown.end(); ++it_sam, ++it_thr) {
+        result.push_back((*it_sam - *it_thr) / *it_thr);
+    }
+    return result;
+  };
+
   // Define variables
   auto d1 = d0.Define("Ethr",  Ethr,  {"mcparticles"})
-	      .Define("nhits", nhits, {"EcalBarrelHits"})
-	      .Define("Esim",  Esim,  {"EcalBarrelHits"})
-	      .Define("fsam",  fsam,  {"Esim","Ethr"})
-        .Define("dE", "Ethr-Esim")
-        .Define("dE_rel", "(Ethr - Esim)/Esim")
+	      .Define("nhits",  nhits,      {"EcalBarrelHits"})
+	      .Define("Esim",   Esim,       {"EcalBarrelHits"})
+	      //.Define("fsam",  fsam,  {"Esim","Ethr"})
+        .Define("fsam",   fsam2,      {"Esim","Ethr"})
+        .Define("dE",     eResol,     {"Esim", "Ethr"})
+        .Define("dE_rel", eResol_rel, {"Esim", "Ethr"})
 	      ;
 
   // Define Histograms
@@ -143,10 +189,10 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   c4->SaveAs("results/emcal_barrel_pions_fsam.pdf");
 
   //Energy Resolution Work
-  auto hdE          = d1.Histo1D({"hdE",      "dE; dE[GeV]; Events",              100, -7.5, 7.5}, "dE");
-  auto hdE_rel      = d1.Histo1D({"hdE_rel",  "dE Relative; dE Relative; Events", 100, -7.5, 7.5}, "dE_rel");
-  auto f1           = hdE_rel->Fit("gaus", "S");
-  const double* res = f1->GetParams();
+  auto hdE          = d1.Histo1D({"hdE",      "dE; dE[GeV]; Events",              20, -7.5, 7.5}, "dE");//changed from 100
+  auto hdE_rel      = d1.Histo1D({"hdE_rel",  "dE Relative; dE Relative; Events", 20, -7.5, 7.5}, "dE_rel");//changed from 100
+  hdE_rel->Fit("gaus", "", "", -7.5,  7.5);
+  double* res       = hdE_rel->GetFunction("gaus")->GetParameters();
 
   //Pass/Fail
   /*
@@ -160,7 +206,7 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
 
   //Energy Resolution Histogram Plotting
   auto *cdE = new TCanvas("cdE", "cdE", 700, 500);
-  cDE->SetLogy(1);
+  cdE->SetLogy(1);
   hdE->GetYaxis()->SetTitleOffset(1.4);
   hdE->SetLineWidth(2);
   hdE->SetLineColor(kBlue);
@@ -172,10 +218,9 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   hdE_rel->GetYaxis()->SetTitleOffset(1.4);
   hdE_rel->SetLineWidth(2);
   hdE_rel->SetLineColor(kBlue);
-  f1->SetLineWidth(2);
-  f1->SetLineColor(kRed);
+  hdE_rel->GetFunction("gaus")->SetLineWidth(2);
+  hdE_rel->GetFunction("gaus")->SetLineColor(kRed);
   hdE_rel->DrawClone();
-  f1->Draw("SAME");
   cdE_rel->SaveAs("results/emcal_barrel_pi0_dE_rel.png");
   cdE_rel->SaveAs("results/emcal_barrel_pi0_dE_rel.pdf");