usercode/README at master · rkunnawa/usercode · GitHub

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 ************* Raghav Kunnawalkam Elayavalli *****************
 ********* Rutgers University - Graduate Student *************
 ************ CMS Heavy Ion - Dr. Sevil Salur ****************

Readme file for Unfolding/Merging/RAA/RpPb calculations and log.

$$ Sept 10th 2013
	- Set up the required macros and header files copied from my directories at UMD server.

$$ Sept 15th 2013
	- Set up RooUnfold-1.1.1 from the package: RooUnfold-1.1.1.tar.gz by the following commands:
		- tar zxf RooUnfold-1.1.1.tar.gz
		- cd RooUnfold-1.1.1
		- make.
		- (Check example)
		- root -l
		$ gSystem->Load("RooUnfold-1.1.1/libRooUnfold");
		$ .x examples/RooUnfoldExample.cxx

	-

useful to read from a tree

TTree* jet_MB = (TTree*)_file0->Get("ak3PFJetAnalyzer/t");TTree* evt_MB = (TTree*)_file0->Get("hiEvtAnalyzer/HiTree");TTree* hlt_MB = (TTree*)_file0->Get("hltanalysis/HltTree");TTree* skim_MB = (TTree*)_file0->Get("skimanalysis/HltTree");jet_MB->AddFriend(evt_MB);jet_MB->AddFriend(hlt_MB);jet_MB->AddFriend(skim_MB);