Hi Stanislav, Sorry if I was not clear enough in my previous answer. We do not intend supporting THbookFile/THbookTree in Root TChain. Rene Brun On Wed, 31 Jul 2002, Stanislav NESTEROV wrote: > > Hello Rene, > Again I must remind you that in THbook* interface we have a > problem that sometimes make this classes unusable or half-functional. > > Even if you try to read ANY value from the N-tuple you wouldn't > succeed. Of course while you using only "Draw" functionality everythings > seem to be OK. > You can say that I must use ROOT-files instead, but for me it is not > feasible. > > So please check THbook* for this malfunction. Thank you. > > Stanislav. > > > On Fri, 26 Jul 2002, Stanislav NESTEROV wrote: > > > Hi Rene, > > You are not completely right. This is the part of my N-tuple > > root [5] tt2->Print() > > ****************************************************************************** > > *Tree :h94 : /l3/l3data/99/ggntp/cc01jurg.ntp > > *Entries : 78412 : Total = 1613614 bytes File Size = 0 * > > * : : Tree compression factor = 1.00 > > ****************************************************************************** > > *Br 32 :Itrg2 : Itrg2/I > > *Entries : 78412 : Total Size= 12394 bytes File Size = 0 * > > *Baskets : 0 : Basket Size= 8000 bytes Compression= 1.00 > > *............................................................................* > > *Br 33 :Itrg3 : Itrg3/I > > *Entries : 78412 : Total Size= 12394 bytes File Size = 0 * > > *Baskets : 0 : Basket Size= 8000 bytes Compression= 1.00 > > *............................................................................* > > *Br 34 :Ntrk : Ntrk/I > > *Entries : 78412 : Total Size= 12388 bytes File Size = 0 * > > *Baskets : 0 : Basket Size= 8000 bytes Compression= 1.00 > > *............................................................................* > > > > As you can see "Ntrk" variable is integer. And it is one. > > I wrote to you that if I issue somthing like > > tree->Draw("Ntrk","","goff") > > then every branch reading is Ok. > > > > Best regards, > > Stanislav. > > On Fri, 26 Jul 2002, Rene Brun wrote: > > > > > > Hi Stanislas, > > > > > > It is likely that your branch "Ntrk" contains more variables than just > > > an integer. In your case, you overwrite your program by reading > > > the branch variables behind the variable "Int_t nt". > > > If you have more variables, you should define a C struct or a class > > > or use MakeClass such that all variables in the branch are read > > > correctly into the struct. > > > > > > Rene Brun > > > > > > > > > On Fri, 26 Jul 2002, Stanislav NESTEROV wrote: > > > > > > > > > > > Hello Fons, > > > > > > > > Recently I've tried to read some N-tuples via > > > > THbookFile+THbookTree+THbookBranch classes but it was not so easy. > > > > > > > > While I was using only "Draw" functionality all seem to be OK, but when > > > > I've tried to do some readings of certain branches of N-tuple I've > > > > got into a big trouble: I can not do this at ALL: > > > > > > > > So from the beginning: > > > > > > > > > > > > __________________________________________________________________ > > > > Content of my N-tuple: > > > > > > > > ===> Directory : //lun10 > > > > 94 (N) Gamma Gamma Ntuple > > > > 9001 (1) NTRK > > > > 9002 (1) E?BGO! > > > > 9003 (1) E?HCAL! > > > > 9004 (1) E?BGO+HCAL! > > > > 9011 (1) NTRK > > > > 9012 (1) E?BGO! > > > > 9013 (1) E?HCAL! > > > > 9014 (1) E?BGO+HCAL! > > > > 9015 (1) InTEC and OuterTEC TRG > > > > 9099 (1) number of events. > > > > > > > > root [0] gSystem->Load("libHbook.so"); > > > > root [1] THbookFile f("/l3/l3data/99/ggntp/cc01jurg.ntp"); > > > > root [2] tt2=(THbookTree*)f.Get(94) > > > > (class THbookTree*)0x86fca48 > > > > root [3] Int_t nt > > > > root [4] tt2->SetBranchAddress("Ntrk",&nt) > > > > root [5] bran = (THbookBranch*)tt2->GetBranch("Ntrk") > > > > (class THbookBranch*)0x87b4468 > > > > root [6] bran->GetEntry(30) //!!!!!!!!!!!!!!!! > > > > ***** ERROR in HNBUFF : Buffer structure not initialized. : ID= 94 > > > > ***** ERROR in HGNTF : Cannot find Ntuple buffer structure : ID= 94 > > > > (Int_t)0 > > > > ________________________________________________________________________ > > > > > > > > > > > > BUT if I Drawing exatly the same variable ( here "Ntrk") via > > > > > > > > tt2->Draw("Ntrk") > > > > > > > > before getting any entry from this branch then everything is allright. > > > > > > > > So I found in procedure THBookFile::InitLeaves(...) that in case > > > > of empty `TreeFormula* ' argument this procedure just quits. Very strange > > > > solution I think. > > > > > > > > In any case N-tuple initialization (for branches) is failed and one can > > > > only obtain some result if call procedures that using > > > > TTreePlayer::InitLoop with some related formula. > > > > > > > > May be the best solution is slightly change the > > > > THbookTree::InitLeaves()? I really don't know. Or just throw out from > > > > THbookFile::GetEntryBranch call of HGNTF subrouting (in such specific > > > > cases)? > > > > > > > > Best regards > > > > Stanislav. > > > > > > > > > > > > > > > > >
This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:51:02 MET