Show how NanoAOD files can be processed with RDataFrame.
This tutorial illustrates how NanoAOD files can be processed with ROOT dataframes. The NanoAOD-like input files are filled with 66 mio. events from CMS OpenData containing muon candidates part of 2012 dataset (DOI: 10.7483/OPENDATA.CMS.YLIC.86ZZ and DOI: 10.7483/OPENDATA.CMS.M5AD.Y3V3). The macro matches muon pairs and produces an histogram of the dimuon mass spectrum showing resonances up to the Z mass. Note that the bump at 30 GeV is not a resonance but a trigger effect.
More details about the dataset can be found on the CERN Open Data portal.
void df102_NanoAODDimuonAnalysis()
{
ROOT::RDataFrame df(
"Events",
"root://eospublic.cern.ch//eos/opendata/cms/derived-data/AOD2NanoAODOutreachTool/"
"Run2012BC_DoubleMuParked_Muons.root");
auto df_2mu = df.Filter(
"nMuon == 2",
"Events with exactly two muons");
auto df_os =
df_2mu.Filter(
"Muon_charge[0] != Muon_charge[1]",
"Muons with opposite charge");
auto h =
df_mass.Histo1D({
"Dimuon_mass",
"Dimuon mass;m_{#mu#mu} (GeV);N_{Events}", 30000, 0.25, 300},
"Dimuon_mass");
auto c =
new TCanvas(
"c",
"", 800, 700);
c->SetLogx();
c->SetLogy();
h->GetXaxis()->SetTitleSize(0.04);
h->GetYaxis()->SetTitleSize(0.04);
label.
DrawLatex(0.205, 0.775,
"#rho,#omega");
label.
SetTextSize(0.030); label.
DrawLatex(0.630, 0.920,
"#sqrt{s} = 8 TeV, L_{int} = 11.6 fb^{-1}");
}
{
df102_NanoAODDimuonAnalysis();
}
R__EXTERN TStyle * gStyle
ROOT's RDataFrame offers a modern, high-level interface for analysis of data stored in TTree ,...
virtual void SetTextFont(Font_t tfont=62)
Set the text font.
virtual void SetTextSize(Float_t tsize=1)
Set the text size.
To draw Mathematical Formula.
TLatex * DrawLatex(Double_t x, Double_t y, const char *text)
Make a copy of this object with the new parameters And copy object attributes.
virtual void SaveAs(const char *filename="", Option_t *option="") const
Save this object in the file specified by filename.
void SetOptStat(Int_t stat=1)
The type of information printed in the histogram statistics box can be selected via the parameter mod...
virtual void SetNDC(Bool_t isNDC=kTRUE)
Set NDC mode on if isNDC = kTRUE, off otherwise.
void AddProgressBar(ROOT::RDF::RNode df)
Add ProgressBar to a ROOT::RDF::RNode.
void EnableImplicitMT(UInt_t numthreads=0)
Enable ROOT's implicit multi-threading for all objects and methods that provide an internal paralleli...
|> | [Elapsed time: 0:01m processing file: 1 / 1 processed evts: 1000 / 50123395 5.33e+02 evt/s 26:08:17h remaining time (per file being processed)]
|================================================================> | [Elapsed time: 0:02m processing file: 1 / 1 processed evts: 5332000 / 54231870 2.67e+06 evt/s 0:18m remaining time (per file being processed)]
|===================================================================================================================================================> | [Elapsed time: 0:03m processing file: 1 / 1 processed evts: 12374000 / 55053565 4.12e+06 evt/s 0:10m remaining time (per file being processed)]
|=======================================================================================================================================================================================================================================> | [Elapsed time: 0:04m processing file: 1 / 1 processed evts: 19603000 / 55875260 4.90e+06 evt/s 0:07m remaining time (per file being processed)]
|=============================================================================================================================================================================================================================================================================================================================> | [Elapsed time: 0:05m processing file: 1 / 1 processed evts: 27317000 / 56696955 5.46e+06 evt/s 0:05m remaining time (per file being processed)]
|==========================================================================================================================================================================================================================================================================================================================================================================================================> | [Elapsed time: 0:06m processing file: 1 / 1 processed evts: 34362000 / 57518650 5.73e+06 evt/s 0:04m remaining time (per file being processed)]
|===============================================================================================================================================================================================================================================================================================================================================================================================================================================================================> | [Elapsed time: 0:07m processing file: 1 / 1 processed evts: 42124000 / 59983735 6.02e+06 evt/s 0:02m remaining time (per file being processed)]
|============================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================> | [Elapsed time: 0:08m processing file: 1 / 1 processed evts: 49732000 / 60805430 6.22e+06 evt/s 0:01m remaining time (per file being processed)]
|==================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================> | [Elapsed time: 0:09m processing file: 1 / 1 processed evts: 56877000 / 61540413 6.32e+06 evt/s 0:00m remaining time (per file being processed)]
[Total elapsed time: 0:10m processed files: 1 / 1 processed evts: 61540413 / 61540413]
Events with exactly two muons: pass=31104343 all=61540413 -- eff=50.54 % cumulative eff=50.54 %
Muons with opposite charge: pass=24067843 all=31104343 -- eff=77.38 % cumulative eff=39.11 %
- Date
- August 2018
- Author
- Stefan Wunsch (KIT, CERN)
Definition in file df102_NanoAODDimuonAnalysis.C.