Example macro showing some major probability density functions in ROOT. The macro shows four of them with respect to their two variables. In order to run the macro type:

```
root [0] .x mathcoreStatFunc.C
```

**Author:** Andras Zsenei

*This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Wednesday, August 17, 2022 at 09:34 AM.*

In [1]:

```
TF2 *f1a = new TF2("f1a","ROOT::Math::cauchy_pdf(x, y)",0,10,0,10);
TF2 *f2a = new TF2("f2a","ROOT::Math::chisquared_pdf(x,y)",0,20, 0,20);
TF2 *f3a = new TF2("f3a","ROOT::Math::gaussian_pdf(x,y)",0,10,0,5);
TF2 *f4a = new TF2("f4a","ROOT::Math::tdistribution_pdf(x,y)",0,10,0,5);
TCanvas *c1 = new TCanvas("c1","c1",800,650);
c1->Divide(2,2);
c1->cd(1); f1a->SetLineWidth(1);
f1a->Draw("surf1");
c1->cd(2); f2a->SetLineWidth(1);
f2a->Draw("surf1");
c1->cd(3); f3a->SetLineWidth(1);
f3a->Draw("surf1");
c1->cd(4); f4a->SetLineWidth(1);
f4a->Draw("surf1");
```

Draw all canvases

In [2]:

```
gROOT->GetListOfCanvases()->Draw()
```