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I Ivan, The result is to be expected. You create a graph with 60 points, but fill only 10. All the other points are at 0,0 by default. Rene Brun On Fri, 5 Nov 2004, Ivan So wrote: > Hi root folks, > > Would someone tell me why I always get one more point at (0, 0) in the > following code: > > // We get one more point at (0, 0). Why? > > void zero0 () { > > gROOT->Reset(); > > TCanvas *c1= new TCanvas("c1","Plots",400,10,900,780); > TGraph *gr = new TGraph(60); > > c1->DrawFrame(-1.2, -1.2, 1.2, 1.2, "10 Points"); > > gr->SetMarkerColor(kRed); > > Float_t px, py; > const Float_t s = 10.; > > for (int i = 0; i < 10; i++) { > px = TMath::Sin(i / s); > py = TMath::Cos(i / s); > gr->SetPoint(i,px,py); > > } > gr->Draw("*"); > c1->Modified(); > c1->Update(); > } > > The root version is Version 4.01/02. > > Thanks. > > Ivan > so@bnl.gov >

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