Hi Gail,
An example
{
TH1F h("h","test",100,-2,2);
h.FillRandom("gaus",1000);
h.Fit("gaus");
const int npar = 3;
TMatrixD matrix(npar,npar);
gMinuit->mnemat(matrix.GetElements(),npar);
matrix.Print();
matrix.Draw("text");
}
Rene Brun
On Wed, 4 Dec 2002, Gail Ruby wrote:
> Dear Rooters,
>
> I am running version 3.03/09 on a Linux maxhine.
>
> After doing my fit using TF1::Fit:
>
> root [15] TF1 *ff = new TF1("ff", "gaus+pol3(3)", 1.78, 1.95)
> root [16] ff->SetParameters(hsD0Mass1->GetMaximum(), 1.862, 0.006, 1, 1,1, 1)
> root [17] hsD0Mass1->Fit("ff")
>
>
> I typed in the following:
>
> root [18] const int npar =7; doublematrix[npar][npar]; gMinuit->mnemat(&matrix[0][0],npar);
> root [19]
>
> The return provided nothing.
>
> How do I get a display on the screen of the error matrix?
>
> Thanks,
> Gail Ruby
>
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