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
>>
>>
--
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