Improve pie chart
The pie chart is a very common way to represent the distribution of a single categorical variable, but they can be more difficult to interpret than bar charts.
This is a pie chart of a dataset called pies that contains the favorite pie flavors of 98 people. Improve the representation of these data by constructing a bar chart that is ordered in descending order of count.
This exercise is part of the course
Exploratory Data Analysis in R
Exercise instructions
- Use the code provided to reorder the levels of
flavorso that they're in descending order by count. - Create a bar chart of
flavorand orient the labels vertically so that they're easier to read. The default coloring may look drab by comparison, so change thefillof the bars to"chartreuse".
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Put levels of flavor in descending order
lev <- c("apple", "key lime", "boston creme", "blueberry", "cherry", "pumpkin", "strawberry")
pies$flavor <- factor(pies$flavor, levels = lev)
# Create bar chart of flavor
ggplot(___, aes(x = ___)) +
geom_bar(fill = ___) +
theme(axis.text.x = element_text(angle = 90))