DQM monitor element of Th2poly #14
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@ywkao Now that cms-sw/cmssw#41932 looks good, could you update this PR as well? We will be testing it after the christmas break. |
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No problems. I will update the PR this month. |
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This PR introduces a new type of DQM MonitorElement, TH2Poly, for HGCal DQM in the future. This feature allows the display of polygonal histograms on the CMS DQM GUI. As a demonstration, a wafer map can be displayed like the screenshot here [1].
TH2Poly is a 2D histogram class inherited from TH2. Polygonal bins, defined by TGraph, can be loaded using the AddBin() method. After setting up the polygonal bins, a TH2Poly object can store information through Fill() or SetBinContent().
A workflow for creating polygonal histograms looks like this:
DQM Service -> DQM EDAnalyzer -> CMS DQM GUI
An implementation of TH2Poly in DQM Service and MonitorElement is necessary to display the polygonal histograms. It involves updates on two repositories: dqmgui_prod and cmssw. The idea is implemented in a user branch of cmssw [2]. From the branch, monitor elements of the TH2Poly object can be stored in a DQM root file [3]. We will prepare another pull request to cmssw soon.
A related issue to this PR can be found here, #13
@pfs, @hqucms
[1] https://ykao.web.cern.ch/ykao/raw_data_handling/hgcal_dqm_gui/screenshot_demo_th2poly_wafermap.png
[2] ywkao/cmssw@d9e70fc
[3] A DQM root file: /afs/cern.ch/work/y/ykao/public/example_HGCAL_DQM/DQM_V0001_HGCAL_R000123469.root