Hello: I work with ROOT 3.05/05 on Linux RedHat I have a Struct (C Like) similar to struct ST{ Int_t number; Int_t var1[1000]; Int_t var2[1000]; Float_t var3[1000]; Float_t var4[1000]; } NTUPLE; And then I define the following Branches: MyTree->Branch("NumberOfData", &NTUPLE.number, "number/I"); MyTree->Branch("DATA1", NTUPLE.var1, "var1[number]/I:var2[number]" ); MyTree->Branch("DATA2", NTUPLE.var3, "var3[number]/F:var4[number]" ); When I execute MyTree->Fill(), and I Draw the content of the file, var1 and va2 have the same information, and var3 and var4 have the same information ... Why? What am I doing wrong? Thank you very much in advance for your help and patience. Jose Caballero.
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