Hi Rooters, I still did not figure out how to get the slider in the DrawPanel working for a TGraph. Rene Brun wrote: > The TGraph::DrawPanel function is currently not implemented. > I have added a message in the new version. > Currently there are two ways to zoom on a graph: > - via the command line by changing the pad range > - drawing a TH1F empty object (setting min and max), then > drawing the graph on top and invoking DrawPanel on the TH1F object. I like the second option because it seems only a few mouse clicks away. So I tried the following macro: { gROOT->Reset(); c1 = new TCanvas("c1","A Simple Graph Example",200,10,700,500); Int_t n = 10; Float_t x[n], y[n]; for (Int_t i=0;i<n;i++) { x[i] = i*0.1; y[i] = x[i]; } hpx = new TH1F("hpx","This is the px distribution",10,0,1); hpx->SetMinimum(0.0); hpx->SetMaximum(1.0); hpx->SetXTitle("X title"); hpx->SetYTitle("Y title"); hpx->Draw(); gr = new TGraph(n,x,y); gr->SetLineColor(2); gr->SetMarkerColor(4); gr->SetMarkerStyle(21); gr->Draw("CP"); } The DrawPanel works for 'hpx' but I lose the data points of the graph because they do not get updated. Is there a statement, I should add ?? Best Regards, Eddy Offermann
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