Norbert Danneberg wrote: > > HI , > how can I get access from within a macro function to a TTree which was > loaded interactively from an hbook converted file? > > root[21] Int_t BGOList[3] = {1,2,3}; > root[22] f1 = new TFile("MyFile.root"); > root[23] .L GainHV.C; > > root [24] f1.ls(); > TFile** bt416_05_eve.root > TFile* bt416_05_eve.root > KEY: TTree h10;1 event > root [25] GainHV(&BGOList, 3) > > Error: No symbol h10.Print() in current scope > FILE:/data/norbert/proc/root/macros/ > GainHV.C LINE:62 > *** Interpreter error recovered *** > You can pass the pointer to the Tree to your function GainHV. Change it to be void GainHV(&BGOList, int, TTree *tree) then in your macro, you have file = new TFile("MyFile.root") TTree *h10 = (TTree*)file->Get("h10"); GainHV(&BGOList,3,h10); Rene Brun
This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:34:33 MET