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/
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