B.2 Color, size, shape

We can color by any variable in the data set by putting color = variable inside aes(). In this case, we’ll choose the categorical variable season.type.

Code

ggplot(d, aes(x = ascore, 
              y = hscore, 
              color = season.type))+
  geom_point()

If we want to change the color of all points to the same color, we can specify that color inside geom_point() instead.

Code

ggplot(d, aes(x = ascore, 
              y = hscore))+
  geom_point(color = 'gray')

Likewise, we can size each point, or change the shape of each point, based on column in the data.

Code

ggplot(d, aes(x = ascore, 
              y = hscore, 
              color = season.type, 
              size  = season.type, 
              shape = season.type))+
  geom_point()

(You normally wouldn’t choose all three to be the same column, this is just for illustration.)