I have a ROOT files containing different version of the same ntuple as follows. How to open a specific version of the ntuple, e.g. “nt;1”. Any hints are appreciated.
root [3] TFile f1("o0.root")
(TFile &) Name: o0.root Title:
root [4] .ls
TFile** o0.root
TFile* o0.root
KEY: TNtuple nt;10
KEY: TNtuple nt;9
KEY: TNtuple nt;8
KEY: TNtuple nt;7
KEY: TNtuple nt;6
KEY: TNtuple nt;5
KEY: TNtuple nt;4
KEY: TNtuple nt;3
KEY: TNtuple nt;2
KEY: TNtuple nt;1