Re: [ROOT] Fit parameters in stats box

From: Rene Brun (Rene.Brun@cern.ch)
Date: Thu Jan 18 2001 - 19:21:22 MET


Hi Wen,
If you want to get more than one stats/fit box in a pad, use the technique I
reported in a previous mail today. Change the name of the "stats" box
to "stats1", etc.

Rene Brun

meiwen wrote:
> 
> Dear Rooters,
>     I have a histogram which should be fitted with different formulars
> in different ranges. I use the "R+" option to implement this function.
> But with gStyle->SetOptFit(1) I got only the parameters of the first
> formular in the statistic box. my code is following:
> 
>   myfunc1 = new TF1("myfunc1", "[0]+[1]*(950.-x)**2", 950, 1014);
>   myfunc1->SetLineColor(6);
>   myfunc1->SetLineWidth(1);
> 
>   myhisto->Fit("myfunc1", "R0");
>          gStyle->SetOptFit(1);
>   myfunc1->GetParameters(&par[0]);
>   myfunc1->SetParameters(par);
>   myfunc2 = new TF1("myfunc2", "gaus",1014 ,1030);
>   myfunc2->SetLineColor(6);
>   myfunc2->SetLineWidth(1);
> 
>    myhisto->Fit("myfunc2", "R0+");
>         gStyle->SetOptFit(1);
> 
> How can I get the rest parameters' values? Thanks for any help.
>     Best Regards                Wen Mei



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