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Galina Asova wrote: > > Dear ROOT users, > > I have a problem with graphs when I try to plot a point immediately > after calculating its value - updating the graph during runtime. With > TH1F this works - the plot is filled but with TGraph I don't see any > updating. Here is a piece of code - I tried to compare in which way this > is possible: > > //TGraph > TCanvas *can = new TCanvas("Graph", "Graph!"); > Float_t *a = new Float_t[100]; > Float_t *b = new Float_t[100]; > TGraph *gr = new TGraph(100, a, b); > gr->Draw("AP*"); > > for (int i = 0; i < 100; i++){ > a[i] = i; > b[i] = 5 * sin(i); > can->Modified(); > can->Update(); > printf ("calculated\n"); > gSystem->ProcessEvents(); > } You never change the graph in your example. I think you have to add a line like gr->SetPoint(i,a[i],b[i]); before the can->Modified(); Cheers, Ingo -- "What're quantum mechanics?" "I don't know. People who repair quantums I suppose." --Rincewind, Terry Pratchett "Eric"

**Next message:**daan: "[ROOT] keyboard trouble"**Previous message:**Alden Joyce: "[ROOT] stupendous!"**In reply to:**Galina Asova: "[ROOT] graph problem"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]

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