Problem with error fit

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 Tue Apr 05 2005 - 13:06:02 MEST