Allow NAs to be represented as Option types at the F# boundary about rprovider HOT 3 OPEN

I'm a little bit unclear what you are trying to achieve here. But I think in general we don't have good handling for NA in the RProvider. Seems like NaNs are working correctly, but probably NAs are not.

If you have to resort to using evaluate (or anything on the R engine) then we have probably failed. Rather, we should have a way of representing NA on the F# side, so you can map your NaNs to NA on the F# side of things.

The natural way of doing this is probably using the Option type (so a sequence of Option would get converted into a numeric vector, where the None values are NA), or perhaps using Nullable?

Do you think that would work for you?

from rprovider.

Being able to "map to NA on the F# side of things" would be great, and I agree that using options makes sense.

I'm relatively new to F# (coming from R), but the alternatives I can think of are quite messy...

from rprovider.

This probably depends on what R.NET provides (I think it always returns N.A. as Double.NaN), but it would be good to investigate and provide some option.

from rprovider.