Add function to compute empirical share of cases with missing reference date

[epinowcast]

Add function to compute empirical share of cases with missing reference date

[adrian-lison]

Okay, I agree. For downstream use in seeding/offset, we may need it by date of reference, but we can handle it in an offset helper function if we go for the simpler option mentioned above.

[seabbs]

So in my head, I thought we were talking about empirical missingness by report date which would obviously be much simpler. Do you think there is a strong argument for trying to back out the approximate missingness by date of reference?

In terms of where this should go I would have thought in the obs_miss part of the preprocessed data?

[seabbs]

I've added a prototype of this to #106 (enw_missing_reference)

[seabbs]

Done in #106