Re: Problem with error fit

Could you send the shortest possible running script reproducing your problem ?

Rene Brun

On 5 Apr 2005, Francesco Perfetto wrote:

> Hi all,
>
> I have this problem: I have a graph generated with the class TGraph:
>
> ...
> gr = new TGraphErrors(n,E,rms);
> //gr->SetTitle("Low purity");
> gr->SetMarkerColor(4);
> gr->SetMarkerStyle(21);
> gr->Draw("A*");
> gr->Write(graf);
> ...
>
> now, when I fit the graph with (for example) a "pol0" or a "pol1" I have
> that the error on p0 and p1 in the box pave stats is different (is
> another thing) from the error that appear in the root shell.
>
> Why ?
> What is the right error ?
> Is this a my mistake ?
>
> I use root 4.00/04 on RH 9.0
>
> Ciao
> Francesco.
>
Received on Wed Apr 06 2005 - 18:43:26 MEST