Multicomponent mean and error

In RooFit, how do we access the error and mean of the overall fit if I have fitted it with multiple PDFs, such as Gaussian, Crystal Ball, and a polynomial, using fractions like fraction and fraction1?


I add in the loop @jonas and @moneta .


Hi @Vikas_Raj, what do you mean with the “error and mean of the overall fit”? You mean the best-fit parameter values and their uncertainties?

In this case, you can bet them by returning the result of the fit in a RooFitResult object using the Save() command argument for RooAbsPdf::fitTo() as explained in this tutorial:

Let us know if you need more information!

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