This is a mockup of a student workbook.

Topic heading

Introduction, conceptual things

Sub topic A

Conceptuals Sub topic A

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Exercises Sub topic A

Let’s start with this plot from the diamonds data set:

ggplot(diamonds, aes(x = carat, y = price)) +
  geom_point() +
  geom_smooth()

It builds a scatter plot of the diamonds dataset, with carat on the x-axis and price on the y-axis. geom_smooth() is used to add a smooth line.

With this plot as a starting point, let’s explore some more possibilities of combining geoms.

Exercise 1

Adapt the pre-coded plot, to show only the smooth line:

ggplot(diamonds, aes(x = carat, y = price)) +
  geom_point() +
  geom_smooth()

See Solution to Exercise 1

Exercise 2

Show only the smooth line, but color according to clarity by using a col argument in the aes function.

Exercise 3

Hold the color settings from the previous instructions. This time plot the points, but set the alpha argument of geom_point() to 0.4. This will make the points 40% transparent. Do not include geom_smooth().

Sub topic B

Conceptuals Sub topic B

Exercises Sub topic B

Exercise 4

Exercise 5

Exercise 6

Solutions to Exercises

Solution to Exercise 1

ggplot(diamonds, aes(x = carat, y = price)) +
  geom_smooth()

Back to Exercise 1

Further readings

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Workbook mockup