Re: Getting access to fit parameters.

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William Love wrote:
> 
>   Roothelp
> 
>    I have make a program to fit 1332 data sets, each with a
>  pol2 function.  If I type pol2.Print() I can see the results
>  of each fit.  I want, however to use the polynomial parameters
>  in further analysis.  I can't figure out how to do something
>  like z0 = -0.5*pol2.GetParam(2)/pol2.GetParam(3);
> 
>                                Bill Love

If you have a TF1 object, use
 GetParameter(i) to return the value of param i [0,-->]
 GetParError(i) to return error on parameter i.
Note that TF1 derives from TFormula. Real functions are:
 TFormula::GetParameter
 TF1::GetParError.

See examples in
  http://root.cern.ch/root/HowtoFit.html

Rene Brun

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