doPlotWEvts_Kpipi.C

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void doPlotWEvts_Kpipi(TString evtfile, TString mcfile,
                       TString outfile, TString mass){

//  gROOT->ProcessLine(".L $ROOTPWA/generators/plotWeightedEvts.C+");
  gROOT->ProcessLine(".L $ROOTPWA/generators/plotWeightedEvts_Kpipi.C+");

  TFile* file1=TFile::Open(evtfile,"READ");
  TFile* file2=TFile::Open(mcfile,"READ");
  TTree* data=(TTree*)file1->Get("events");
  TTree* mc=(TTree*)file2->Get("pwevents");

  if (!data) cout << " no data file found! " << endl;
  if (!mc) cout << " no mc file found! " << endl;

  plotWeightedEvts_Kpipi(mc,data,outfile,mass);

  file1->Close();
  file2->Close();

}