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Reference Guide
ratioplot3.C
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1/// \file
2/// \ingroup tutorial_hist
3/// \notebook
4/// Example which shows how you can get the graph of the lower plot and set the y axis range for it.
5///
6/// Since the lower plot is not created until `TRatioPlot::Draw` is called, you can only use the method
7/// afterwards.
8///
9/// \macro_image
10/// \macro_code
11///
12/// \author Paul Gessinger
13
14void ratioplot3() {
16 auto c1 = new TCanvas("c1", "fit residual simple");
17 c1->SetLogy();
18 auto h1 = new TH1D("h1", "h1", 50, -5, 5);
19 h1->FillRandom("gaus", 2000);
20 h1->Fit("gaus", "0");
21 h1->SetMinimum(0.001);
22 h1->GetXaxis()->SetTitle("x");
23 h1->GetYaxis()->SetTitle("y");
24 auto rp1 = new TRatioPlot(h1);
25 rp1->Draw();
26 rp1->GetLowerRefGraph()->SetMinimum(-2);
27 rp1->GetLowerRefGraph()->SetMaximum(2);
28}
R__EXTERN TStyle * gStyle
Definition: TStyle.h:414
The Canvas class.
Definition: TCanvas.h:23
1-D histogram with a double per channel (see TH1 documentation)}
Definition: TH1.h:617
TAxis * GetXaxis()
Get the behaviour adopted by the object about the statoverflows. See EStatOverflows for more informat...
Definition: TH1.h:319
virtual void FillRandom(const char *fname, Int_t ntimes=5000, TRandom *rng=nullptr)
Fill histogram following distribution in function fname.
Definition: TH1.cxx:3523
virtual TFitResultPtr Fit(const char *formula, Option_t *option="", Option_t *goption="", Double_t xmin=0, Double_t xmax=0)
Fit histogram with function fname.
Definition: TH1.cxx:3904
TAxis * GetYaxis()
Definition: TH1.h:320
virtual void SetMinimum(Double_t minimum=-1111)
Definition: TH1.h:398
virtual void SetTitle(const char *title="")
Set the title of the TNamed.
Definition: TNamed.cxx:164
Class for displaying ratios, differences and fit residuals.
Definition: TRatioPlot.h:43
void SetOptStat(Int_t stat=1)
The type of information printed in the histogram statistics box can be selected via the parameter mod...
Definition: TStyle.cxx:1590
return c1
Definition: legend1.C:41
TH1F * h1
Definition: legend1.C:5