Dr. Roberto Barbera wrote: > > Hi Rooters, > > I have the problem of opening a root file, read it and re-write in on > itself or onto another file adding a tree. In particular I'm working on > the AliROOT package for the ALICE experiment and i'd like to read the > hits tree and write it down together with the cluster tree. I looked at > the Event.cxx example in the tutorials but this does not contain the > second part of my task. Any help, possibly a macro skeleton, would be > extremely useful. After all, I'm sure this is a common problem that many > of you have already come across. > Hi Roberto, >From your short mail, I have difficulties to understand what you want to do exactly. With Root, you can open a file in "Update" mode, read data from an existing Tree and fill a new Tree stored in the same file at the same time. Please send me more info (not to the list). Rene Brun
This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:43:32 MET