exp_smoothing() not yielding any results

[lukasmartig]

I am not sure whether it is just a memory problem, but when I run exp_smoothing() I never get any result. Tried the example from the help page and it still does not work even when reducing the data to n=20. Have to stop R from computing. Is this a known issue? I'm never getting any error messages. Using modeltime version 4.2.2 and R 4.0.2 on a laptop with Windows 10, 2.6 GHz CPU, 32 GB RAM.

[mdancho84]

Thanks for creating this issue. Can you provide a reproducible example using reprex?

This will help me evaluate the problem.

[lukasmartig]

Hi Matt, thanks for the quick reply. I'm currently out of office and will send it next week. Good news is: I installed it on my personal notebook (v4.2.2 on R 4.0.2) with all packages from source and up to date and this time all works fine. So I guess either it's an bad installation or a function-conflict in some package.

[lukasmartig]

Hi again, found out what caused the issue. Updating the forecast packages to v8.18 did the trick. The problem lied in function forecast::ets which you call in modeltime::ets_fit_impl. In v8.16 forecast::ets doesn't seem to find an appropriate solution while for v8.18 it converges within half a second. Here a snippet that worked in v8.18, but failed to converge in v8.16:
timeseries_reprex.zip