Hi Andre,
Thanks for reporting this problem in TMultiGraph.
Now fixed in CVS.
Rene Brun
Andre Holzner wrote:
>
> Hi,
>
> I tried combining several TGraphs into a single plot.
> However, I can't make it work.
>
> Should this boiled down example work (macro) ?
>
> {
> Int_t n = 5;
>
> Double_t x[n] = { 60,60.1,60.2,60.3,60.4 };
> TGraph *gr = new TGraph(n,x,x);
> TMultiGraph *mg = new TMultiGraph();
> mg->Add(gr);
> mg->Draw("AL");
>
> }
>
> After starting root and executing the macro, I get the following error
> message:
>
> <TCanvas::MakeDefCanvas>: created default TCanvas with name c1
> Error in <TCanvas::Range>: illegal world coordinates range:
> x1=15000000055879354670346081189857239812301458438980120411468904470533805084809352140353424763585036288.000000,
> y1=12000000000000000579368471762264830745925351641438118996218960879725310776966939220757021024069877760.000000,
> x2=-15000000055879354670346081189857239812301458438980120411468904470533805084809352140353424763585036288.000000,
> y2=12000000000000000579368471762264830745925351641438118996218960879725310776966939220757021024069877760.000000
> Error in <TCanvas::RangeAxis>: illegal axis coordinates range:
> xmin=12000000000000000579368471762264830745925351641438118996218960879725310776966939220757021024069877760.000000,
> ymin=12000000000000000579368471762264830745925351641438118996218960879725310776966939220757021024069877760.000000,
> xmax=-12000000000000000579368471762264830745925351641438118996218960879725310776966939220757021024069877760.000000,
> ymax=12000000000000000579368471762264830745925351641438118996218960879725310776966939220757021024069877760.000000
>
> A canvas is created but the graph does not appear.
> Drawing the Graph gr directly works without any problems.
>
> I also experimented with the TMultiGraph example in the User's Guide on
> Page 58.
> I get a similar error message when I comment (remove) the line
>
> mg->Add(gr2);
>
> i.e. the example doesn't work when the TGraphErrors is not added.
>
> Any ideas ?
>
> thanks,
>
> André
>
> --
> ------------------+----------------------------------
> Andre Holzner | +41 22 76 76750
> Bureau 32 2-C13 | Building 32
> CERN | Office 2-C13
> CH-1211 Geneve 23 | http://wwweth.cern.ch/~holzner/
This archive was generated by hypermail 2b29 : Tue Jan 01 2002 - 17:50:35 MET