Hi,
I’m using TLinearFitter in order to fit datasets in a 3dim space. I’m using a polynom up to grade 2.
I have a few questions:
 I’m trying to illustrate the results by fixing two variables of the fit and make several TF1 out of the 3dim fit. Is there a common method to do this. Currently, I’m calculating the results manually by using GetParameters(). What I’m searching for is
TF1 * TLinearFitter:GetTF1(int fixed par, Double_t p1, Double_t p2, Double_t p3,…) // The entry of the fixed parameter is regardless

Why isn’t there an Double_t TLinearFitter::Evaluate (Double_t p1, Double_t p2, Double_t p3, …) Function, as it is known from TF1??

Is there an easy method to access the confidence level of the fit (in dependency of the parameters? I would like to make a 1d representation (see question 1) including the error limits

How do I access the R^2 (Representing the fitquality). Usually R^2 (always smaller than 1, but close to 1 means good fit)
Thanks
Georg
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_ROOT Version:6.22
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