| Is there a fast way of histogramming RhoCandLists? [message #17245] |
Fri, 05 September 2014 12:50  |
MartinJGaluska
Messages: 203
Registered: March 2010
Location: Germany
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first-grade participant |
From: *physik.uni-giessen.de
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Dear all,
I would like to histogram multiple kinematical variables of multiple RhoCandLists within an analysis task. Instead of defining a lot of histograms or rerunning the task with slight modifications, I was wondering if there already exists a short cut.
I was thinking about a class which would only need the RhoCandList and a prefix as input and would take care of creating (using a vector for instance), filling and saving (to the output root file) the corresponding histograms itself.
Kind regards,
Martin
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| Re: Is there a fast way of histogramming RhoCandLists? [message #17250 is a reply to message #17245] |
Fri, 05 September 2014 22:36  |
Ralf Kliemt
Messages: 507
Registered: May 2007
Location: GSI, Darmstadt
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first-grade participant |
From: *pool.mediaWays.net
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There is even a faster way: The "QA Tools"
See how it is applied in macro/scrut/PndScrutAnaTask:
https://subversion.gsi.de/trac/fairroot/browser/pandaroot/trunk/macro/sc rut/PndScrutAnaTask.cxx
RhoTuple* ntp1 = new RhoTuple("ntp1", "jpsi analysis");
if (ntp1) ntp1->GetInternalTree()->SetDirectory(gDirectory);
PndRhoTupleQA qa(fAnalysis,fIni.P());
...
// dump information about composite candidate tree recursively (see PndTools/AnalysisTools/PndRhoTupleQA)
qa.qaComp("j", jpsi[j], ntp1);
You'll get many ntuples which follow s sort of naming code. First your prefix, here "j", and at the end the observable in play, such as px, py, pz, p, e, .... In between you'll find "d0" for the first daughter in your composite. This cascades down, so e.g. the momentum of the second dughter of the first daughter is labelled with "jd0d1p".
See also https://subversion.gsi.de/trac/fairroot/browser/pandaroot/trunk/PndTools /AnalysisTools/PndRhoTupleQA.h for all the automated possibilities.
Cheers
Ralf
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