Resolve "pi0 resolution for ECal barrel"

Closes #19 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -56,7 +56,7 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   ROOT::RDataFrame d0("events", input_fname);
 
   // Sampling Fraction
-  double samp_frac = 1.0;
+  double samp_frac = 0.0136;
 
   // Thrown Energy [GeV]
   auto Ethr = [](std::vector<dd4pod::Geant4ParticleData> const& input) {
@@ -121,16 +121,8 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
               .Define("nhits",  nhits,      {"EcalBarrelHits"})
               .Define("Esim",   Esim,       {"EcalBarrelHits"})
               .Define("fsam",   fsam,       {"Esim","Ethr"})
-              .Define("dE",     eResol,     {"Esim","Ethr"})
-              .Define("dE_rel", eResol_rel, {"Esim","Ethr"})
               .Define("pid",    getpid,     {"mcparticles"})
               ;
-  // Set sampling Fraction, ideally this will be taken from a json file 
-  samp_frac = *d1.Mean<double>("fsam");
-
-  auto d2 = d1.Define("dE",     eResol,     {"Esim","Ethr"})
-              .Define("dE_rel", eResol_rel, {"Esim","Ethr"})
-              ;
 
   // Define Histograms
   auto hEthr  = d1.Histo1D({"hEthr",  "Thrown Energy; Thrown Energy [GeV]; Events",        100,  0.0,    7.5}, "Ethr");
@@ -139,6 +131,17 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   auto hfsam  = d1.Histo1D({"hfsam",  "Sampling Fraction; Sampling Fraction; Events",      100,  0.0,    0.1}, "fsam");
   auto hpid   = d1.Histo1D({"hpid",   "PID; PID; Count",                                   100,  -220,   220}, "pid");
 
+  // Set sampling Fraction, ideally this will be taken from a json file 
+  cout << "The sampling fraction mean is " << samp_frac << endl;
+  samp_frac = hfsam -> GetMean();
+  cout << "The sampling fraction mean is " << samp_frac << endl;
+
+  auto d2 = d1.Define("dE",     eResol,     {"Esim","Ethr"})
+              .Define("dE_rel", eResol_rel, {"Esim","Ethr"})
+              ;
+
+
+
   // Event Counts
   auto nevents_thrown      = d1.Count();
   std::cout << "Number of Thrown Events: " << (*nevents_thrown) << "\n";
@@ -193,8 +196,8 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   c5->SaveAs("results/emcal_barrel_pions_pid.pdf");
 
   //Energy Resolution Work
-  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, -2, 2}, "dE_rel");//changed from 100
+  auto hdE          = d2.Histo1D({"hdE",      "dE; dE[GeV]; Events",              20, -7.5, 7.5}, "dE");//changed from 100
+  auto hdE_rel      = d2.Histo1D({"hdE_rel",  "dE Relative; dE Relative; Events", 20, -2, 2}, "dE_rel");//changed from 100
   hdE_rel->Fit("gaus", "", "", -2,  2);
   double* res       = hdE_rel->GetFunction("gaus")->GetParameters();