## \file

## \ingroup tutorial_math

## \notebook

## 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:

##

## ~~~{.cpp}

## root [0] .x mathcoreStatFunc.C

## ~~~

##

## Original tutorial by Andras Zsenei.

## \macro_image

## \macro_code

##

## \author Alberto Ferro

import ROOT

f1a = ROOT.TF2("f1a","ROOT::Math::cauchy_pdf(x, y)",0,10,0,10)

f2a = ROOT.TF2("f2a","ROOT::Math::chisquared_pdf(x,y)",0,20, 0,20)

f3a = ROOT.TF2("f3a","ROOT::Math::gaussian_pdf(x,y)",0,10,0,5)

f4a = ROOT.TF2("f4a","ROOT::Math::tdistribution_pdf(x,y)",0,10,0,5)

c1 = ROOT.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")