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It is based on a analysis package developed by J. Sjolin (Stockholm University) and P. Hansson.

Checkout

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The goal is to have a tool that is quick and easy to install and run to facilitate large numebr of iterations as usually needed when doing analysis.

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phansson@pcphuat27]/u1/phansson/jetmetbtag% svn co svn+ssh://svn.cern.ch/reps/atlasusr/phansson/flatana

Run on an example

In order to run on the example you need a ntuple. This example runs on ntuples in e.g.:
/u1/data/user09.DavidWilkinsMiller.trigger.v02.SethCaughron.misal1_mc12.EnhancedBias_1031.digit.RDO.v13004004_AANT_PHCOPY_SLIM/

All the needed compilations are done automatically in the main root macro ana.C.

There is an example analysis/topology class to start from:To run is simple as the needed compilation is done in the root macro automatically. There is an example topology
phansson@pcphuat27/u1/phansson/jetmetbtag% cd flatana/trunk/topologies/example

The
phansson@pcphuat27/u1/phansson/jetmetbtag/flatana/trunk/topologies/example% ./ana.sh l2rate 10

Run over your own NTuple

In order to run over your own ntuple you need only to create a new FileEvent:

phansson@pcphuat27/u1/phansson/jetmetbtag/flatana/trunk/topologies/example% cp FileEvent_template.h FileEvent_trg.h
phansson@pcphuat27/u1/phansson/jetmetbtag/flatana/trunk/topologies/example% cp FileEvent_template.cxx FileEvent_trg.cxx

Then open your root file (e.g. ntuple.root) and do a makeclass:
phansson@pcphuat27/u1/phansson/jetmetbtag/flatana/trunk/topologies/example% root -l /u1/data/user09.DavidWilkinsMiller.trigger.v02.SethCaughron.misal1_mc12.EnhancedBias_1031.digit.RDO.v13004004_AANT_PHCOPY_SLIM/user09.DavidWilkinsMiller.trigger.v02.SethCaughron.misal1_mc12.EnhancedBias_1031.digit.RDO.v13004004.AANT._00001_slim.root
root 1 CollectionTree->MakeClass("slimclass")

Open slimclass.h and

  1. Copy the declarations of variables and branches to private members of the FileEvent_trg.h
  2. Copy only the initialization of the variables and setbranchaddress from the Init(TTree *tree) functions to FileEvent_trg.cxx function SetBranches (Note that only the initialization of variables and SetBranchAddress() should be copied)

The last step is to schedule this to be recognized in the main macro ana.C:The ana.sh script is just a helper script to run the major