>>>>> "Andreas" == Andreas Goebel <a-goebel at gmx.de> writes:
Andreas> Hi,
Andreas> I?m having problems with lsquares and the lsquares_estimates command.
Andreas> The first problem is a wxMaxima problem: The function doesn?t return the
Andreas> focus to wxMaxima. I have to press abort, then I get the results. This
Andreas> doesn?t happen when an exact solution with solve is found.
Andreas> The second problem seems to be a lsquares problem: In the sample (see
Andreas> attachment) I want to fit a logistic growth function to the given data.
Andreas> I get an empty result. If I remove just one data pair, I get fine
Andreas> results (no matter which data pair I remove).
Andreas> I would very much like to know if there are known bugs and limitations
Andreas> of that command. I have some more problems with it (all of them related
Andreas> to logistic or other growth functions).
Looks like maxima is getting stuck trying to find an exact solution.
(At least I can see maxima is running solve.)
Perhaps this is a bug in lsquares_estimates.
You probably want just a numerical solution, so
lsquares_estimates_approximate, lbfgs, or minpack_lsquares can
probably provide you with the numerical solution.
Ray