doc/v624/ratioplot4_8C.html

void ratioplot4()  {

   gStyle->SetOptStat(0);

   auto c1 = new TCanvas("c1", "fit residual simple");

   auto h1 = new TH1D("h1", "h1", 50, -5, 5);

   h1->FillRandom("gaus", 2000);

   h1->Fit("gaus", "0");

   h1->GetXaxis()->SetTitle("x");

   h1->GetYaxis()->SetTitle("y");

   auto rp1 = new TRatioPlot(h1);

   std::vector<double> lines = {-3, -2, -1, 0, 1, 2, 3};

   rp1->SetGridlines(lines);

   rp1->Draw();

   rp1->GetLowerRefGraph()->SetMinimum(-4);

   rp1->GetLowerRefGraph()->SetMaximum(4);

}

gStyle
R__EXTERN TStyle * gStyle
Definition TStyle.h:412

TCanvas
The Canvas class.
Definition TCanvas.h:23

TH1D
1-D histogram with a double per channel (see TH1 documentation)}
Definition TH1.h:618

TH1::GetXaxis
TAxis * GetXaxis()
Get the behaviour adopted by the object about the statoverflows. See EStatOverflows for more informat...
Definition TH1.h:320

TH1::FillRandom
virtual void FillRandom(const char *fname, Int_t ntimes=5000, TRandom *rng=nullptr)
Fill histogram following distribution in function fname.
Definition TH1.cxx:3525

TH1::Fit
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:3892

TH1::GetYaxis
TAxis * GetYaxis()
Definition TH1.h:321

TNamed::SetTitle
virtual void SetTitle(const char *title="")
Set the title of the TNamed.
Definition TNamed.cxx:164

TRatioPlot
Class for displaying ratios, differences and fit residuals.
Definition TRatioPlot.h:43

TStyle::SetOptStat
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:1589

c1
return c1
Definition legend1.C:41

h1
TH1F * h1
Definition legend1.C:5

ratioplot4
Definition ratioplot4.py:1