Grammar of Graphics concept in R Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a basic scatter plot using ggplot2.

R Programming

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

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

Apoint

Bbar

Cscatter

Dline

Attempts:

3 left

💡 Hint

Common Mistakes

Using geom_bar() or geom_line() instead of geom_point()

The geom_point() function creates a scatter plot in ggplot2, which is the basic geometric object for points.

2fill in blank

medium

Complete the code to map the color aesthetic to the variable 'cyl' in the plot.

R Programming

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

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

Agear

Bwt

Ccyl

Dmpg

Attempts:

3 left

💡 Hint

Common Mistakes

Mapping color to continuous variables like 'wt' or 'mpg' without intention

Mapping color = cyl colors the points based on the number of cylinders, adding an informative visual grouping.

3fill in blank

hard

Fix the error in the code to add a title to the plot using ggtitle().

R Programming

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

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

Ampg vs wt

B"mpg vs wt"

Cmpg_vs_wt

Dmpg_vs_wt()

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the title text

The title text must be a string, so it needs to be enclosed in quotes like "mpg vs wt".

4fill in blank

hard

Fill both blanks to create a histogram of 'mpg' with blue fill color.

R Programming

ggplot(mtcars, aes(x = [1])) + geom_histogram(fill = [2])

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

Ampg

B"blue"

Cwt

D"red"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable for x or missing quotes around color

The histogram should use mpg for the x-axis and fill color set to the string "blue".

5fill in blank

hard

Fill all three blanks to create a boxplot of 'mpg' grouped by 'cyl' with green boxes and a title.

R Programming

ggplot(mtcars, aes(x = [1], y = [2])) + geom_boxplot(fill = [3]) + ggtitle("MPG by Cylinders")

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

Acyl

Bmpg

C"green"

Dwt

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping x and y variables or missing quotes around color

The x-axis groups by cyl, y-axis shows mpg, and the boxplot fill color is "green".