-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi rooters, I have been seekink for a bug in my code for hours and I finally found the solution in the roottalkdigest ;) , but would like to know more about it. I have some classes similar to the the exemple TEvent. I built a tree with it and now want to access the branches. Drawing, cutting and using the treeviewer did worked pefectly. I am now using the possibility to only read one branch as specified in the documentation: - ------- my tree names input_tree // only get kin energy branch input_tree->SetBranchStatus("*",0);// disbles all branches input_tree->SetBranchStatus("Ek",1);// enables kin energy branche TBranch * Ek_branch=input_tree->GetBranch("Ek");// or get Ek_branch->SetBasketSize(16000); Ek_branch->SetAddress(&EvKinEnergy); if (!Ek_branch) cout << "Kinetic energy branch undefined" << endl; if (!input_tree->GetBranchStatus("Ek")) cout << "Kinetic energy branch not active" << endl; cout << "Entries in event branch " << Ek_branch->GetEntries() << endl; cout << "Get entry err code : " << Ek_branch->GetEntry(5) << endl; cout << "Energy = " << EvKinEnergy << endl; - ----- when doing that I always had the same value for EvKinEnergy (its initial value) instead of the value stored in the tree. When calling the TBranch::GetEntries() succeded, but reading the values went wrong. I saw that one is to invoque the TTree::SetMakeClass() method to get it work properly: input_tree->SetMakeClass(1); but I do not find information on this method and do not hunderstand what it does exactly. Could you please tell me more about the role of this method. Thanks a lot for your help. - -- V Régnard GPG signature and ID: http://terrier.homelinux.net/html/persopages/pgp.html Key fingerprint = F350 E39E 8C1B 4E8E D078 6D77 81D8 B38A E8F3 ED1E Key ID: E8F3ED1E La vente forcée de logiciels est illégale en France, comment l'empêcher: http://www.linuxfrench.net/oem/communique/communique1.html -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+yP37gdiziujz7R4RAjd0AJ0dyVoOMenM8Zs1lwNxyTKCoBta8ACfQSw0 g2rhdC9ypuvRsST6LDIct7E= =AZDN -----END PGP SIGNATURE-----
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