Forecasting - Combination of methods

Could you please include a minimal example of what you're working with. It's much easier to troubleshoot code with code:

Ideally you could do this using reprex (short for minimal reproducible example). It will help us help you if we can be sure we're all working with/looking at the same stuff.

If you've never heard of a reprex before, you might want to start by reading the help page. The reprex dos and don'ts are also useful.

Also see the community FAQ on reprex: