I have ≈90 000 medical cases with ≈250 distinct diagnoses between them, distributed over 20 years; the most common of which applies to roughly half, and the least common applies to a handful.
ETA: Each patient can have multiple diagnoses associated.
I'd like to generate some sort of temporal overview by year, so less technically minded people can appreciate the medical qualities of the dataset, but I haven't got a good way to do this other than a 250 by 20 table.
I was wondering if there was some interesting way of presenting this kind of data? (I.e. many sparse binary variables.)