¿Methods failing with ordered factors?

[kikollan]

I am having some problems computing margin and plotting effects for models with ordered factors. It is quite possible that I am doing something wrong.

This seems to fail, for example:

mtcars_ord <- mtcars %>%
mutate(cyl_ord = cut(cyl, c(0, 2, 4, 6, 10)),
cyl_ord = ordered(cyl_ord))

x <- lm(mpg ~ cyl_ord + wt, data = mtcars_ord)
cplot(x, "cyl_ord")

[leeper]

This should now be fixed.