Key components

three key components of a ggplot2 plot

• data
• aesthetics
• geom

e.g.

ggplot(data = mpg, aes(displ, hwy)) + 
  geom_point()

ggplot() + 
  geom_point(data = mpg, aes(x = displ, y = hwy))

ggplot() + 
  geom_point(data = mpg, mapping = aes(x = displ, y = hwy))

ggplot() + 
  geom_point(data = mpg, mapping = aes(x = displ, y = hwy))

ggplot(data = midwest) + 
  geom_point(data = mpg, aes(x = displ, y = hwy))