Hello rooters,
I try to use the Fumuli algorithm through TVirtualFitter interface, as described in the UserGuide, but the error is appeared:
FumiliMinimizer: Error : wrong FCN type. Try to use default minimizer
Switching to Minuit deliver from this error and program works properly. How to remove this error?
I have fixed in CVS for Minuit2. The minexam.cxx example now will work if you set Minuit2.
However, the example cannot work with both Fumili and Fumili2.
Fumili works with Chi2 or Likelihood FCN, and it requires you implement the derivatives for each term. To make it work you would need to modify the fcnk0() function in minexam to calculate as well the derivatives.