Themes and theme customization in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to apply a minimal theme to a ggplot.

R Programming

library(ggplot2)
ggplot(mtcars, aes(x=wt, y=mpg)) + geom_point() + [1]()

Drag options to blanks, or click blank then click option'

Atheme_classic

Btheme_minimal

Ctheme_dark

Dtheme_bw

Attempts:

3 left

💡 Hint

Common Mistakes

Using a theme function that changes the plot style but is not minimal.

Forgetting the parentheses after the theme function.

The theme_minimal() function applies a minimalistic theme to the plot, removing background grids and decorations.

2fill in blank

medium

Complete the code to change the base font size of a ggplot theme to 16.

R Programming

ggplot(mtcars, aes(x=wt, y=mpg)) + geom_point() + theme_minimal(base_size = [1])

Drag options to blanks, or click blank then click option'

A16

B10

C12

D20

Attempts:

3 left

💡 Hint

Common Mistakes

Using a smaller font size like 10 or 12 when the goal is to increase size.

Forgetting to assign the value to base_size.

Setting base_size = 16 changes the base font size of the theme to 16 points.

3fill in blank

hard

Fix the error in the code to set the plot background color to light blue.

R Programming

ggplot(mtcars, aes(x=wt, y=mpg)) + geom_point() + theme(plot.background = element_rect(fill = [1]))

Drag options to blanks, or click blank then click option'

Alight blue

Bblue light

C#lightblue

Dlightblue

Attempts:

3 left

💡 Hint

Common Mistakes

Using color names with spaces like 'light blue'.

Adding '#' before color names that are not hex codes.

The color name must be a single word string like 'lightblue'. Spaces or incorrect formats cause errors.

4fill in blank

hard

Fill both blanks to customize axis text color and size.

R Programming

ggplot(mtcars, aes(x=wt, y=mpg)) + geom_point() + theme(axis.text.x = element_text(color = [1], size = [2]))

Drag options to blanks, or click blank then click option'

A"red"

B14

C12

D"blue"

Attempts:

3 left

💡 Hint

Common Mistakes

Using color without quotes.

Choosing a smaller size when the goal is to increase text size.

Setting color = "red" changes the x-axis text color to red, and size = 14 makes the text larger.

5fill in blank

hard

Fill all three blanks to create a custom theme with green panel background, no grid lines, and bold axis titles.

R Programming

ggplot(mtcars, aes(x=wt, y=mpg)) + geom_point() + theme(panel.background = element_rect(fill = [1]), panel.grid.major = [2], axis.title = element_text(face = [3]))

Drag options to blanks, or click blank then click option'

A"green"

Belement_blank()

C"bold"

D"italic"

Attempts:

3 left

💡 Hint

Common Mistakes

Using color names without quotes.

Using incorrect functions to remove grid lines.

Using 'italic' instead of 'bold' for axis titles.

Setting fill = "green" colors the panel background green, element_blank() removes major grid lines, and face = "bold" makes axis titles bold.