Rene Brun
Oliver Mang wrote:
>
> Dear ROOTers,
> I found an odd behaviour of TTree::GetMinimum() (ROOT 2.21.08/SUSe Linux
> 6.1) :
> root [48] .p cr_on.GetMaximum("mjd");
> (Float_t)5.117500000000e+04
> root [49] .p cr_on.GetMinimum("mjd");
> (Float_t)5.116100000000e+04
> root [50] .p cr_on.GetEstimate();
> (Int_t)1019098
> root [51] cr_on.Draw("mjd");
>
> The resulting histogram however has entries ranging from 50855 to 51175.
> cr_on is a TChain, I have used
> cr_on.SetEstimate(cr_on.GetEntries());
> and all other histograms (created via TTree::Draw() ) are fine. Seems that
> TTree::GetMinimum() gives a wrong result. I have also tried Macros based
> on the ROOT source code, they show the same behaviour.
>
> Is it my fault (somehow) or is it bug ?
> Any help is appreciated,
> Oliver
>
> --
> Oliver Mang
> Institut fuer Experimentelle und Angewandte Physik, CAU Kiel
> Phone: ++49/431/880-2482 E-Mail: mang@ifkhep.uni-kiel.de
> ---------------------------------------------------------------
> "The future is not what it used to be"