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ratioplot4.C
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1/// \file
2/// \ingroup tutorial_hist
3/// \notebook
4/// Example that shows custom dashed lines on the lower plot, specified by a vector of floats.
5///
6/// By default, dashed lines are drawn at certain points. You can either disable them, or specify
7/// where you want them to appear.
8///
9/// \macro_image
10/// \macro_code
11///
12/// \author Paul Gessinger
13
14void ratioplot4() {
16 auto c1 = new TCanvas("c1", "fit residual simple");
17 auto h1 = new TH1D("h1", "h1", 50, -5, 5);
18 h1->FillRandom("gaus", 2000);
19 h1->Fit("gaus", "0");
20 h1->GetXaxis()->SetTitle("x");
21 h1->GetYaxis()->SetTitle("y");
22 auto rp1 = new TRatioPlot(h1);
23 std::vector<double> lines = {-3, -2, -1, 0, 1, 2, 3};
24 rp1->SetGridlines(lines);
25 rp1->Draw();
26 rp1->GetLowerRefGraph()->SetMinimum(-4);
27 rp1->GetLowerRefGraph()->SetMaximum(4);
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 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