If TChain is a TTres’ subtype and even overrides some methods, why they have different behaviour? [#-o] Concretely, I want to speedup program by loading only selected branches. But I can’t just call TChain::GetBranch(), I need to take special care and check whether file with TTree changed. [#-o] …

Hi, The problem is fChain->LoadTree(ev); ... br->GetEntry(ev);which should read Long64_t localEntry = fChain->LoadTree(ev); ... br->GetEntry(localEntry); The previous code is requesting a ‘out-of-bound’ entry from the branch after the first file … [Note the 2nd code will work whether fCh…

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Class TChain : public TTree

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Pepe_Le_Pew September 29, 2016, 7:13am 6

How are multiple TTree->Draw()s done? ROOT

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