> Ooops, I made a mistake, I should have remembered that this only works if
> the function has already been drawn...
>
> TF2 *ex = new TF2(........);
> ex->Draw();
> ex->GetHistogram()->GetXaxis()->SetTitle("x");
> ex->GetHistogram()->GetYaxis()->SetTitle("y");
Thank you for you help.
It works, now.
Annalisa
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