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applyBDT.C
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applyBDT.C
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#include <cstdlib>
#include <iostream>
#include <fstream>
#include <map>
#include <string>
#include "TChain.h"
#include "TFile.h"
#include "TTree.h"
#include "TString.h"
#include "TTreeFormula.h"
#include "TObjString.h"
#include "TSystem.h"
#include "TROOT.h"
#include "TMVA/TMVAGui.C"
#if not defined(__CINT__) || defined(__MAKECINT__)
// needs to be included when makecint runs (ACLIC)
#include "TMVA/Tools.h"
#include "TMVA/Reader.h"
#include "TMVA/MethodCategory.h"
#include "TMVA/Tools.h"
#endif
void applyBDT(std::string iName="/mnt/hscratch/dabercro/skims2/BDT_Signal.root",
TString inputVariables = "trainingVars.txt",
TString outName = "/scratch/dabercro/Output.root",
std::string iWeightFile="weights/TMVAClassificationCategory_BDT_simple_alpha.weights.xml") {
TMVA::Tools::Instance();
TMVA::Reader *reader = new TMVA::Reader( "!Color:!Silent" );
TString BDTName;
ifstream configFile;
configFile.open(inputVariables.Data());
TString tempFormula;
std::vector<float> Evaluated;
std::vector<TString> Strings;
TTreeFormula *Formulas[40];
configFile >> BDTName; // Is the name of the BDT
while(!configFile.eof()){
configFile >> tempFormula;
if(tempFormula != ""){
Evaluated.push_back(0.);
Strings.push_back(tempFormula);
}
}
TFile *lFile = new TFile(iName.c_str());
TTree *lTree = (TTree*) lFile->FindObjectAny("DMSTree");
for(unsigned int i0 = 0;i0 < Strings.size();i0++){
reader->AddVariable(Strings[i0],&Evaluated[i0]);
Formulas[i0] = new TTreeFormula(Strings[i0],Strings[i0],lTree);
}
std::string lJetName = "BDT";
reader->BookMVA(lJetName .c_str(),iWeightFile.c_str());
int lNEvents = lTree->GetEntries();
TFile *lOFile = new TFile(outName,"RECREATE");
TTree *lOTree = new TTree("DMSTree","DMSTree");
float lMVA = 0; lOTree->Branch(BDTName,&lMVA ,BDTName+TString("/F"));
for (Long64_t i0=0; i0<lNEvents;i0++) {
if (i0 % 10000 == 0) std::cout << "--- ... Processing event: " << double(i0)/double(lNEvents) << std::endl;
lTree->GetEntry(i0);
for(unsigned int i1 = 0;i1 < Strings.size();i1++){
Evaluated[i1] = Formulas[i1]->EvalInstance();
}
lMVA = float(reader->EvaluateMVA(lJetName.c_str()));
lOTree->Fill();
}
lOTree->Write();
lOFile->Close();
delete reader;
}