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Re: Statistics::LineFit versus gnuplot, results differ

by sn1987a (Chaplain)
on Apr 27, 2014 at 02:11 UTC ( #1083969=note: print w/replies, xml ) Need Help??


in reply to Statistics::LineFit versus gnuplot, results differ

kevbot is on to something here. The two systems use rather different methods for fitting the data.

Statistics::LineFit and LibreOffice are doing a standard linear least squares fit. This is not an iterative process and is not dependent on any initial guesses.

The Gnuplot documentation for fit says that it uses a nonlinear least-squares (NLLS) Marquardt-Levenberg algorithm.

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