document the default height

[Fil]

see #337 and https://observablehq.com/@observablehq/plot-default-height

(cheat sheet #318)

[mbostock]

I like the notebook, but I’m tempted to make the README description more hand-wavy. I feel like either we explicit document the logic in pseudocode, or we just leave it vague like: “If a height is not specified, Plot will attempt to chose a reasonable default height based on the y and fy scale types and, for ordinal scales, the cardinality of the domain. The default height ranges from TK to TK, with 400 for the common case where y is quantitative and fy is not present.”

[Fil]

We could publish the notebook and link to it for details.

[Fil]

(Notebook further updated to take #837 into account.)

[Fil]

18 months later, it's published :) https://observablehq.com/@observablehq/plot-default-height

EDIT the URL above was redirected to the documentation, see new URL: https://observablehq.com/d/f7ce87cd798d9674

[Fil]

didn't mean to close the PR!

[Fil]

closing, it seems ok to not document this more in depth