Can you specify different geoms for different facets in a ggplot?

Question

How do you specify different geoms for different facets in a ggplot?

(Asked on behalf of @pacomet, who wanted to know.)

Answer 1

here is another approach by subsetting data:

ggplot(mtcars, aes(mpg, disp)) + facet_wrap(~cyl) + 
  geom_point(data = subset(mtcars, cyl == 4)) +
  geom_line(data = subset(mtcars, cyl == 6)) +
  geom_text(data = subset(mtcars, cyl == 8), aes(label = gear))