I have a macro which uses RooFit to make some fits to my toy data. I am using the fitTo() method of RooAbsPdf to do the fit.
I would like to see how the fit is affected by doing the fit using the Chisq method rather than the -log(L) method which is the default in RooFit.
In the documentation for fitTo(), I couldn’t find any mention of a named argument (or old-style fit option letter) which lets you do the fit using the chisq method.
Could anyone tell me what it is?