Use mutate or similar as part of recipes?

recipes
tidymodels

#1

Let's say I have a dataset of houses with a last sale date. Some of these are missing because the home never had a last sale date, and so I'd like to set the missing values to a baseline, like say, 1900-01-01. Is this possible using recipes, I don't want to drop or impute these, as that doesn't really make sense for the data.


#2

We're planning on having steps that can do this (hopefully ready for the next release in a few weeks).