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TrainTestSplit.C
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TrainTestSplit.C
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#include <TROOT.h>
#include <TChain.h>
#include <TFile.h>
#include <iostream>
const Int_t factor = 10;
void TrainTestSplit()
{
TString filename = "$EOSPATH/data/added/PhotonID/output_GJet_Combined_DoubleEMEnriched_TuneCP5_13TeV_Pythia8_reweighted.root";
TFile *initialfile = TFile::Open(filename, "READ");
TFile *outfile = TFile::Open(TString(filename).ReplaceAll(".root", "_smallsplit.root"), "RECREATE");
TTree *signal = static_cast<TTree*>(initialfile->Get("promptPhotons"));
TTree *background = static_cast<TTree*>(initialfile->Get("fakePhotons"));
// Creating the train and test trees for signal and background.
TTree *signalTrain = signal->CloneTree(0);
signalTrain->SetName("SignalTrain");
TTree *signalTest = signal->CloneTree(0);
TTree *signalLeft = signal->CloneTree(0);
TTree *backgroundTrain = background->CloneTree(0);
TTree *backgroundTest = background->CloneTree(0);
TTree *backgroundLeft = background->CloneTree(0);
signalTest->SetName("SignalTest");
backgroundTrain->SetName("BackgroundTrain");
backgroundTest->SetName("BackgroundTest");
signalTrain->SetAutoSave(-100000);
signalTest->SetAutoSave(-100000);
backgroundTrain->SetAutoSave(-100000);
backgroundTest->SetAutoSave(-100000);
// Signal loop
for (unsigned int i=0; i<signal->GetEntries(); i++ )
{
if ( i%1000000 == 0 ) cout << "Processing signal entry " << i << " ... " << std::endl;
signal->GetEntry(i);
if ( i%factor == 0 )
{
signalTrain->Fill();
}
if ( (i%factor)-1 == 0 )
{
signalTest->Fill();
}
else
{
//signalLeft->Fill();
}
}
// Background loop
for (unsigned int i=0; i<background->GetEntries(); i++ )
{
if ( i%1000000 == 0 ) cout << "Processing background entry " << i << " ... " << std::endl;
background->GetEntry(i);
if ( i%factor == 0 )
{
backgroundTrain->Fill();
}
if ( (i%factor)-1 == 0 )
{
backgroundTest->Fill();
}
else
{
//backgroundLeft->Fill();
}
}
outfile->Write();
outfile->Close();
}