void Test(){

  RooRealVar* t = new RooRealVar("t","time",-5,5);
  RooRealVar* mean = new RooRealVar("mean","mean",0);
  RooRealVar* sigma = new RooRealVar("sigma","sigma",1);
  RooGaussian* gauss = new RooGaussian("gauss","gauss",*t,*mean,*sigma);

  RooPlot *frame = t->frame();
  gauss->plotOn(frame);

  TCanvas* doek = new TCanvas("doek","doek",2700,2400);
  frame->Draw();
  doek->SaveAs("test.png");

}