[Ifeffit] Least Squares Fitting in Athena

Matt Newville newville at cars.uchicago.edu
Tue May 24 16:08:00 CDT 2005

Hi Stanislav,

Can you send me a simple example?  I've been looking into some
problems with the calculated uncertainties from Ifeffit's
minimize(), which is what Athena uses.  At this point, I'm not
sure what the problem is, but it does look like there may be
some numerical instabilities lurking somewhere.



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