[R] aniMoutm/foiegras Assistance

[Bert Gunter]

The obvious: all optimization procedures can be subject to such errors, and
simplifying models and/or weakening the criteria for stopping (increasing
step size, increasing the delta of the change in value that signals
convergence, trying different starting values for the parameters, etc.) are
more or less standard procedures to get convergence. It can be tricky --
numerical optimization is part art as well as science.

If you don't get a satisfactory reply here or at SO, you might wish to
contact the package maintainer: see ?maintainer.

Cheers,
Bert


On Sun, Jan 29, 2023 at 2:53 PM ZAC WARHAM <zac.warham using students.mq.edu.au>
wrote:

> Hi all, I am receiving the error *Newton failed to find minimum* whilst
> trying to fit a move persistence model in this package. I think the error
> is related to the optimiser in the TMB package but it is beyond my
> statistics/coding knowledge to track down the specific cause and solution.
> I would appreciate it if anyone knew some resources to assist with fixing
> this. I have put a MRE and sample data over on Stackoverflow if anyone
> wants a closer look -
>
> https://stackoverflow.com/questions/75253642/how-do-i-fix-newton-failed-to-find-minimum-in-r
>
> --
>
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