Re: Drawing the leafs of TTrees

That works perfectly for interactive shell (of course, without SetBatch).

But for some (weird?) reason in automated mode -- I mean C++ standalone script -- FindObject("Graph") still returns NULL...

--
Best regards,
Ilya Orlov.

ATLAS experiment, CERN
Electromagnetic LAr end-cap calorimeter group




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> gROOT->SetBatch(kTRUE);

> TCanvas *c = new TCanvas;

> ntuple->Draw("px:py>>myg","","");

> TGraph* gr_tmp = (TGraph*) c->FindObject("Graph");

> // Use gr_tmp

> delete c; // This will delete the canvas and the Graph

> gROOT->SetBatch(kFALSE);