Partial feature tagging

[mitchelloharawild]

@earowang

Some features like features_stl return elements of different tags ("trend" and "seasonality"). Is it reasonable to allow feature registration to define tags for individual values of the output? That way feature_set(tag = "seasonality") would match features_stl but only return the computed values that are relevant to seasonality.

This may be difficult to implement, as the output of many features are not length stable.

[earowang]

Only functions can own tags.

[mitchelloharawild]

So is that a no? Keep things simple and have tags match entire feature functions?

[earowang]

Nope. If vector names follow standardised and good-practice naming, surely contains(season) is more intuitive to extract the features after computing. It's easy to look up functions not returned names.