Resolve "pi0 resolution for ECal barrel"

Closes #19 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -125,12 +125,6 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
               .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 +133,15 @@ 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 
+  samp_frac = hfsam -> GetMean();
+
+  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";