New fit function implementation

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -180,10 +180,8 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
   //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, -7.5, 7.5}, "dE_rel");//changed from 100
-  TFitResultPtr f1  = hdE_rel->Fit("gaus", "S");
-  const double* res = f1->GetParams();
-  auto tf1          = new TF1("", "TMath::Gaus(x, [0], [1], [2])", -7.5, 7.5);
-  tf1               -> SetParameters(res[0], res[1], res[2]); 
+  auto f1           = hdE_rel->Fit("gaus", "", "", -7.5,  7.5);
+  double* res       = f1->GetParams();
 
   //Pass/Fail
   /*
@@ -209,10 +207,9 @@ 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);
-  tf1->SetLineWidth(2);
-  tf1->SetLineColor(kRed);
+  hdE_rel->GetFunction("gaus")->SetLineWidth(2);
+  hdE_rel->GetFunction("gaus")->SetLineColor(kRed);
   hdE_rel->DrawClone();
-  tf1->Draw("SAME");
   cdE_rel->SaveAs("results/emcal_barrel_pi0_dE_rel.png");
   cdE_rel->SaveAs("results/emcal_barrel_pi0_dE_rel.pdf");