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 + +-----------------------------------------------------------------+
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