Grouping variables
We'll continue with the previous exercise by considering the situation of looking at sub-groups in our dataset. For this we'll encounter the invisible group aesthetic.
mtcars has been given an extra column, fcyl, that is the cyl column converted to a proper factor variable.
This exercise is part of the course
Intermediate Data Visualization with ggplot2
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Using mtcars, plot mpg vs. wt, colored by fcyl
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# Add a point layer
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# Add a smooth lin reg stat, no ribbon
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