Many variables
In addition to aesthetics, facets are another way of encoding factor (i.e. categorical) variables. They can be used to reduce the complexity of plots with many variables.
Our goal is the plot in the viewer, which contains 7 variables.
Two variables are mapped onto the color aesthetic, using hue and lightness. To achieve this we combined fcyl and fam into a single interaction variable, fcyl_fam. This will allow us to take advantage of Color Brewer's Paired color palette.
Cet exercice fait partie du cours
Intermediate Data Visualization with ggplot2
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
# See the interaction column
mtcars$fcyl_fam
# Color the points by fcyl_fam
ggplot(mtcars, aes(x = wt, y = mpg, ___ = ___)) +
geom_point() +
# Use a paired color palette
___(___ = ___)