plot
plot copied to clipboard
observablehq
Raise an error when a reducer expects numeric input but is given non-numeric input
I've rewritten this PR against main and following your comments.
One thing to note is that we run the test on each call to the reducer. It will usually be fast (returning immediately), so there is no need to memoize, but there might be weird cases (large tables full of null values) where it's not.