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compareDistributions.C
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1 // This file is part of the Acts project.
2 //
3 // Copyright (C) 2017 CERN for the benefit of the Acts project
4 //
5 // This Source Code Form is subject to the terms of the Mozilla Public
6 // License, v. 2.0. If a copy of the MPL was not distributed with this
7 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 
9 #include "TFile.h"
10 #include "TH1F.h"
11 #include "TROOT.h"
12 #include "TTree.h"
13 
17 
18 void
19 compareDistributions(std::string inFile1,
20  std::string hist1Name,
21  int col1,
22  std::string inFile2,
23  std::string hist2Name,
24  int col2)
25 {
26  std::cout << "Opening file: " << inFile1 << std::endl;
27  TFile inputFile1(inFile1.c_str());
28  std::cout << "Opening file: " << inFile2 << std::endl;
29  TFile inputFile2(inFile2.c_str());
30  std::cout << "Comparing Histograms: " << hist1Name << " & " << hist2Name
31  << std::endl;
32 
33  TH1F* h1 = (TH1F*)inputFile1.Get(hist1Name.c_str());
34  TH1F* h2 = (TH1F*)inputFile2.Get(hist2Name.c_str());
35 
36  h1->SetLineColor(col1);
37  h1->DrawNormalized();
38  h2->SetLineColor(col2);
39  h2->DrawNormalized("same");
40 
41  TLegend* leg = new TLegend(0.72, 0.71, 0.99, 0.95);
42  leg->AddEntry(h1, hist1Name.c_str());
43  leg->AddEntry(h2, hist2Name.c_str());
44  leg->Draw();
45 
46  h1->SetDirectory(0);
47  h2->SetDirectory(0);
48 
49  inputFile1.Close();
50  inputFile2.Close();
51 }