expand_limits(...)
panels or all plots. This function is a thin wrapper around
geom_blank
that makes it easy to add such values.
p <- ggplot(mtcars, aes(mpg, wt)) + geom_point() p + expand_limits(x = 0)
p + expand_limits(y = c(1, 9))
p + expand_limits(x = 0, y = 0)
ggplot(mtcars, aes(mpg, wt)) + geom_point(aes(colour = cyl)) + expand_limits(colour = seq(2, 10, by = 2))
ggplot(mtcars, aes(mpg, wt)) + geom_point(aes(colour = factor(cyl))) + expand_limits(colour = factor(seq(2, 10, by = 2)))