#0) Copy training tree to local area or specify paths in macro
#1) Train BDT:
root -l TMVA_L3BDT.C

#2) View TMVA GUI:
root.exe '$ROOTSYS/tmva/test/TMVAGui.C("L3_BDT.root")'

#3) Evaluate BDT response:
root -l TMVA_L3BDTApplication.C+

#4) Make plots:
root -l triggerPlots.C