/** class PhysicsTools/PatExamples/PatTauAnalyzer
*
* Tutorial on pat::Taus
*
* author: Christian Veelken, UC Davis
*
* NOTE: The tutorial has been prepared and tested using CMSSW_2_2_13.
* In order to run the tutorial, you need to check-out newer versions
* of the following packages from cvs:
*
* cvs co -r CMSSW_2_2_13 PhysicsTools/PatAlgos
* cvs up -r 1.2.2.6 PhysicsTools/PatAlgos/python/tools/tauTools.py
* cvs co -r global_PFTau_22X_V00-02-03 RecoTauTag
* cvs co -r V00-12-01-02 DataFormats/TauReco
*
* After you compiled these packages (by executing 'scramv1 b'),
* you can produce the pat::Tau plots by executing:
*
* cmsRun analyzePatTau_fromAOD_cfg.py
* root patTau_idEfficiency.C
* .q
*
* This will produce .eps file showing the tau id. efficiency as function of Pt, Eta and Phi.
*
* You can look at the other plots produced by executing 'cmsRun analyzePatTau_fromAOD_cfg.py' by doing:
*
* root patTauHistograms.root
* new TBrowser
*
* and then click on "ROOT Files" --> patTauHistograms.root --> analyzePatTau
* and finally the name of the histogram you wish to look at.
*
*/