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jbabb |
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//
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// A root macro to plot MC and data on the
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// same histogram for a variety of different
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// variables.
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//
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// John Babb 11/11/10
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//
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//ROOT includes
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#include "TTree.h"
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#include "TFile.h"
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#include "TBranch.h"
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#include "TLeafF.h"
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#include "TLeafI.h"
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#include "TH1F.h"
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#include "TH2F.h"
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#include "THStack.h"
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//System includes
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#include <TObject.h>
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#include <TMinuit.h>
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#include <TLorentzVector.h>
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#include <TMath.h>
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#include <TString.h>
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#include <TStyle.h>
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#include <TLegend.h>
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#include <TCanvas.h>
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#include <TPad.h>
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#include <TGraphErrors.h>
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#include <TSystem.h>
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#include <vector>
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#include <stdio.h>
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#include <stdlib.h>
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#include <iostream>
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#include <string>
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void histocompare() {
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TString path1 = "/uscms_data/d2/jbabb/CMSSW_4_2_5/src/TopQuarkAnalysis/Skynet/test/Skynet_Preselection_AltMassReco_";
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TString path2 = "/uscms_data/d2/jbabb/CMSSW_4_2_5/src/TopQuarkAnalysis/Skynet/test/Skynet_Preselection_AltMassRecoWithErrors_";
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//Get files
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TFile *file1 = new TFile(path1+"Zprime2000.root", "open");
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TFile *file2 = new TFile(path2+"Zprime2000.root", "open");
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//Get trees
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TTree *tree1 = (TTree*)file1->Get("PATuple");
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TTree *tree2 = (TTree*)file2->Get("PATuple");
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int n1 = tree1->GetEntries();
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int n2 = tree2->GetEntries();
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float scale = float(n2)/float(n1);
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//List the variables that we want plots of
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int nVariables = 3;
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int nBins = 50;
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TString VariableList[] = {
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"unfittedEvent_ttInvariantMass", "unfittedHadTopMass", "unfittedLepTopMass"
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};
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double VariableMax[] = { 3000., 1000., 1000.
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};
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double VariableMin[] = { 0., 0., 0.
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};
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TString PlotType = ".png";
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//Loop over all of the variables we want to plot
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for ( int i = 0; i < nVariables; i++ ) {
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// TTbar
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float entry1;
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int entries_tree1 = tree1->GetEntries();
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TH1F *Plot1 = new TH1F( "Spring11_"+VariableList[i], "Spring11_"+VariableList[i], nBins, VariableMin[i], VariableMax[i]);
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TBranch *Branch1 = tree1->GetBranch( VariableList[i] );
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Branch1->SetAddress(&entry1);
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TCanvas* c1 = new TCanvas();
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c1->cd();
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for ( int j = 0; j < entries_tree1; j++ ) {
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Branch1->GetEntry(j);
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Plot1->Fill(entry1);
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}
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Plot1->SetLineColor(kRed);
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Plot1->Scale( scale, "" );
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Plot1->Draw();
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c1->Update();
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delete c1;
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float entry2;
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int entries_tree2 = tree2->GetEntries();
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TH1F *Plot2 = new TH1F( "Summer11_"+VariableList[i], "Summer11_"+VariableList[i], nBins, VariableMin[i], VariableMax[i]);
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TBranch *Branch2 = tree2->GetBranch( VariableList[i] );
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Branch2->SetAddress(&entry2);
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TCanvas* c1 = new TCanvas();
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c1->cd();
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for ( int j = 0; j < entries_tree2; j++ ) {
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Branch2->GetEntry(j);
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Plot2->Fill(entry2);
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}
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Plot2->SetLineColor(kBlue);
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Plot2->Draw();
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c1->Update();
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delete c1;
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TCanvas* c9 = new TCanvas();
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c9->cd();
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Plot1->Draw("");
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c9->Update();
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Plot2->Draw("SAME");
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c9->Update();
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TLegend *leg = new TLegend(.6, .75, .95, .95);
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leg->AddEntry(Plot1, "Reco without errors", "l");
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leg->AddEntry(Plot2, "Reco with errors", "l");
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leg->Draw();
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TString plotname = "Combined_"+VariableList[i]+PlotType;
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c9->Print( plotname );
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delete c9;
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delete Plot1;
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delete Plot2;
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} //for i
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}//DataPlotter
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