position_jitter: Jitter points to avoid overplotting.

ggplot(mtcars, aes(am, vs)) + geom_point()  # Default amount of jittering will generally be too much for # small datasets: ggplot(mtcars, aes(am, vs)) + geom_jitter()  # Two ways to override ggplot(mtcars, aes(am, vs)) +  geom_jitter(width = 0.1, height = 0.1) ggplot(mtcars, aes(am, vs)) +  geom_jitter(position = position_jitter(width = 0.1, height = 0.1))  # The default works better for large datasets, where it will # take up as much space as a boxplot or a bar ggplot(mpg, aes(class, hwy)) +  geom_jitter() +  geom_boxplot()