Summarizing by year
The summarize() function is especially useful because it can be used within groups.
For example, you might like to know how much the average "agreeableness" of countries changed from year to year. To examine this, you can use group_by() to perform your summary not for the entire dataset, but within each year.
Latihan ini adalah bagian dari kursus
Case Study: Exploratory Data Analysis in R
Petunjuk latihan
Add a group_by() to your code to summarize() within each year.
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
# Change this code to summarize by year
votes_processed %>%
summarize(total = n(),
percent_yes = mean(vote == 1))