forecastxgb-r-package
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Better way to choose maxlag
The choice of maxlag is the most obvious way to improve overall performance. I see two ways ahead:
a. do some comprehensive testing of different values and work out a better default formula b. let the user do it by brute force - some kind of cross-validation to choose the best value.
Probably will want to do both these - ie have good performing defaults, but also the option to determine the optimal value of the hyperparameter. Doing b. first will help with the a. anyway.
What about ADF and KPSS tests ?