Hi Pasha, You are right about TTree::GetEntry. The important thing is that the member fEntries in both TH1 and TTree is stored as a double. Rene Brun On Sun, 19 Dec 1999, Pasha Murat (630)840-8237 FNAL (630)859-3463 home wrote: > it might make sense to have an input parameter of > TTree::GetEntry (and also TChain::GetEntry) being of the same > type (Stat_t) as the return type of TTree::GetEntries. > Right now they are different: > > virtual Stat_t GetEntries() > virtual Int_t GetEntry(Int_t entry = 0, Int_t getall = 0) > ^ > so it is not quite clear how one could use the fact that > TTree::GetEntries returns `double'. > best, Pasha > > > Rene Brun wrote: > > > Dear Selim, > > As you say, "you did not see the point" > > How would you proceed if you have an histogram, a Tree > > or likely a TChain with more than 2 billion entries ? > > > > Because longlong is not yet a portable data type, > > the only way to survive is to do the job with a double. > > > > Rene Brun > > > > On Fri, 17 Dec 1999, Selim Issever wrote: > > > > > Dear concerned, > > > > > > line 70 of my mo.C is: > > > Int_t sNumEntries = sTree->GetEntries(); > > > > > > but while compiling I get: > > > mo.C:70: warning: initialization to `int' from `double' > > > > > > It works anyway,.. but does it make sense to give the number of entries back > > > as a double? 1.5 entires?! *shrug* but maybe I just dont see the point,.. > > > >
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