Wolfgang Korsch wrote: > > Hi, > > I have data which span a range from 1e-6 to 1e-1 (in x) and > I would like to display them on a log scale (in x). > The command "ntuple->SetLogx(1);" does only display from 1e-5 to > 1e-2, also filling a (2d) hist doesn't seem to help. > How can I set my x-axis from 1e-6 to 1e-1 ? SetLogx is not a member function of TTree but TPad. Example: Root > c1 = new TCanvas("c1") Root > c1->SetLogx(); Root > TH2F h2("h2","example",2,1.e-6,1.e-1,2,0,100) Root > h2.Draw() Root > // assume you have somewhere two arrays on n points x and y Root > gr = new TGraph(n,x,y) Root > gr->Draw("L") Rene Brun
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