yes, it is possible to append new entries to a Tree. Do:
TFile *f = new TFile("myfile.root","update");
TTree *T = (TTree*)f->Get("mytree");
T->SetBranchAddress(....) //one for each top level branch
loop on
T->Fill();
T->Write();
Rene Brun
Balint Radics wrote:
>
> Hello,
>
> My question is: Is it possible to append new data columns to an TNtuple
> after I wrote it to a root file? I mean I would "UPDATE" the root file and
> add a plus column to my existing ntuple. Is this possible? How?
>
> Thanx,
>
> Balint
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