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.
Questo esercizio fa parte del corso
Exploratory Data Analysis in R
Istruzioni dell'esercizio
- 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".
Esercizio pratico interattivo
Prova a risolvere questo esercizio completando il codice di esempio.
# 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))