/// \file /// \ingroup tutorial_hist /// \notebook /// Example which shows how you can get the graph of the lower plot and set the y axis range for it. /// /// Since the lower plot is not created until `TRatioPlot::Draw` is called, you can only use the method /// afterwards. /// /// \macro_image /// \macro_code /// /// \author Paul Gessinger void ratioplot3() { gStyle->SetOptStat(0); auto c1 = new TCanvas("c1", "fit residual simple"); c1->SetLogy(); auto h1 = new TH1D("h1", "h1", 50, -5, 5); h1->FillRandom("gaus", 2000); h1->Fit("gaus", "0"); h1->SetMinimum(0.001); h1->GetXaxis()->SetTitle("x"); h1->GetYaxis()->SetTitle("y"); auto rp1 = new TRatioPlot(h1); rp1->Draw(); rp1->GetLowerRefGraph()->SetMinimum(-2); rp1->GetLowerRefGraph()->SetMaximum(2); }