{
  gROOT->ProcessLine(".L tf.cpp+");
  Double_t x[] = {1., 2., 3.};
  Double_t y[] = {2., 3., 4.};
  Double_t ex[] = {0., 0., 0.};
  Double_t ey[] = {0.2, 0.3, 0.4};
  TGraphErrors tge(3, x, y, ex, ey);
  TF1* f1 = new TF1("f1",tf,0.,2.,2);
  f1->SetParameters(1.,2.);
  tge.Fit("f1");
  tge.Draw("A*");
  f1->FixParameter(0,1.);
  tge.Fit("f1");

 TPaveStats *st = (TPaveStats*)tge->FindObject("stats");
    if(st){
      st->SetName("myStats");
      TList *list = st->GetListOfLines();
      TText *p1 = st->GetLineWith("RMS");
      list->Remove(p1); 
      st->Modify();
      st->Print();
        }
}