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FitToFunction which algorithm?

Jan 11, 2015 at 9:30 AM

have currently used your FitToFunction algorithm to fitting Fabry-Perot ringes from CCD-Chip. It works great!!! Thanks a lot for the library.
I have just one question: what for a algorithm behind it? (Levenberg-Marquardt)?

Feb 8, 2015 at 11:33 PM
FitToFunction uses Powell's algorithm, a line search algorithm for optimizing arbitrary functions without derivatives. Levenberg-Marquardt is a great algorithm, but it requires derivatives, so to use it we would either have to ask uses to supply derivative functions or compute them numerically.