Fitting one point

ROOT
1

In the following code there is obvious problem when fitting one point with pol0 which is legal and than drawing the function.
Whats the problem?

void
foo()
{
  TCanvas* c = new TCanvas();
  TGraph* g = new TGraph();     
  g->SetPoint(0, 1, 2);
  g->Fit("pol0");        
  TF1* f = g->GetFunction("pol0");
  f->Draw();
}
2

The fit is correct. Instead of
TF1* f = g->GetFunction(“pol0”);
f->Draw();
do
g->Draw(“ap”)

The problem in this special case is that teh function is defined in the range [1,1]

Rene

3

ok[1, 1] is the problem but Draw(“ap”) will do nothing if g->Fit(“pol0”) but one have to fit
with constant function in a range:Fit(“pol0”, “”, “”, 0, 1) or something like this which is a bit strange but probably there is no other way.

thanks