TDatime is based on the Unix time on Unix systems. There are various setters
(see the class doc).
The changes by Olivier are posterior to 3.05/05. Use 3.05/07.
Please communicate with Olivier Couet for further exchanges on this question.
Olivier will be back at work the first week of September.
Rene Brun
Dariusz Miskowiec wrote:
>
> Dear Rene,
>
> Many thanks for this recommendation. However, the variable
> I want to display is the standard UNIX time, i.e. the time
> offset I should use is exactly 0. I do not think it helps
> if I generate this zero via TDatime(1970,01,01,00,00,00),
> excuse me, this even cannot be done at all because TDatime
> does not accept such early dates. So I insist: root 3.05/05
> behaves differently from older versions (3.03/07), and in
> particular seems to have a problem with time offsets before
> 1996. It looks to me like it uses internally TDatime for
> some reason.
>
> Naively I would think that plotting things versus standard
> UNIX time is one of the main applications of the time display
> feature and thus I am a little surprised that I am having
> all this trouble...
>
> Best regards
> Dariusz Miskowiec
>
> Rene Brun wrote:
> > Hi Dariusz,
> >
> > You should set the time offset with a statement like
> > TDatime t;
> > gStyle->SetTimeOffset(t.Convert());
> >
> > see examples at : http://root.cern.ch/root/HowtoTimeAxis.html
> >
> > Olivier Couet has made several improvements in the time axis
> > in the recent releases. see the above URL for more details.
> >
> > Rene Brun
> >
> > On Thu, 21
> > Aug 2003,
> > Dariusz Miskowiec wrote:
> >
> >
> >>Dear Rooters,
> >>
> >>It seems that
> >>
> >>gStyle->SetTimeOffset(0);
> >>hi=new TH1F("nic","nic",10,0,1e8);
> >>hi->GetXaxis()->SetTimeDisplay(1);
> >>hi->GetXaxis()->SetTimeFormat("%y:%m:%d");
> >>hi->Draw();
> >>
> >>produces very different numbers on the horizontal axis when
> >>ran with root 3.03/07 and 3.05/05 on CERN lxplus. The newer
> >>root version gives a wrong result.
> >>
> >>Best regards
> >>Dariusz Miskowiec
> >>
> >>
>
> --
> +-----------------------------------------------------------------+
> + Dariusz Miskowiec E-mail: D.Miskowiec@gsi.de +
> + GSI, Planckstr. 1 Phone: 0049-6159-712-133 +
> + D-64291 Darmstadt Fax: 0049-6159-712-989 +
> +-----------------------------------------------------------------+
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:15 MET