Add faceting categorical heatmap plot
Basically like .plot.ca
, but not restricted to CA. This should be a matter of identifying the shared functionality and outsourcing it somewhere where it can be re-used.
(With the xarray facetgrid pcolormesh it is super difficult to create a suitable colorbar – and messy to fix it afterwards. We have that one solved with the CA plot and the ColorManager
, so that part should be easy if we have a standalone plot.)