Hello! Im a beginner in ROOT. I have two tasks: Read from the file” model_event.root " a branch with particle collision events containing objects of the Event class (the file Event.cxx). Build a two-dimensional histogram with the number of intervals (bin) equal to 50 and for the module radius of …

this code works as it should: TFile *f= TFile::Open(“model_event.root”); TTree t=(TTree)f->Get(“EventTree”); Event* myEvent = 0; Track* myTracks = 0; double fVx=0,fVy=0,fVz=0,fPx=0,fPy=0,fPz=0; t->SetBranchAddress("ModelEvent",&myEvent); TH2D *h1 = new TH2D("h1","title",50,-3,3,50,0,5); TH1D *…

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Reading from TTree

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tree, hist

Wile_E_Coyote June 5, 2020, 2:21pm 8

Header files for Trees ROOT

“Most recent” documentation about how to generate and use an “analysis skeleton”: TTree::MakeClass (see also “ROOT User’s Guide” → “Trees” → “Using TTree::MakeClass”) TTree::MakeSelector (see also “ROOT Primer” → “File I/O and Parallel Analysis” → “N-tuples in ROOT” → “For the advanced user: Processing trees with a selector script” and “ROOT User’s Guide” → “Trees” → “Using TTree::MakeSelector” and “ROOT User’s Guide” → “Example Analysis”) TTree::MakeProxy ROOT::RDataFrame (uses the T…

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