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  3. Data Science Visualization - Module 2

Exercise

Exercise 22. Two smooth density plots 3

We can also assign groups using the fill argument. When using the geom_density geometry, color creates a colored line for the smooth density plot while fill colors in the area under the curve.

We can see what this looks like by running the following code:

heights %>% 
  ggplot(aes(height, fill = sex)) + 
  geom_density()

However, here the second density is drawn over the other. We can change this by using something called alpha blending.

Instructions

100 XP

Set the alpha parameter to 0.2 in the geom_density function to make this change.