You can have a look on the exemple "multifit.C"
http://root.cern.ch/root/html/examples/multifit.C.html
Look at the lines :
g1->GetParameters(&par[0]);
g2->GetParameters(&par[3]);
g3->GetParameters(&par[6]);
look at GetParameter and GetParameters in
http://root.cern.ch/root/html/TFormula.h.
Double_t TFormula::GetParameter(Int_t ipar) will let you get one
parameter, eg :
Double_t mean = fit->GetParameter(1);
And void GetParameters(Double_t* params) will gives you every parameter in
an array.
Hope it helps,
Yannick
_/ Yannick Patois \_________________ Address (home) __________________
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On Mon, 5 Jul 1999, Stephen Markacs wrote:
>
> How do I get the mean and sigma from a fit? I know it prints them to the
> root session, but I want to actually get at them within my code so I can
> put them on my plot.
>
> Thanks.
>
> S t e p h e n M a r k a c s
> stephen@phys.columbia.edu
> http://phys.columbia.edu/~stephen/
>
>