[Ifeffit] Negative Sigma^2

Palomino, Robert rpalomino at bnl.gov
Tue Sep 13 12:32:46 CDT 2011

I am trying to fit data I recently collected and occasionally I am
getting negative sigma squared values. Could anyone tell me what this is
indicative of: am I using the wrong model or are my initial guesses of
some parameters way off?



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