Summarizing by year and country
You're more interested in trends of voting within specific countries than you are in the overall trend. So instead of summarizing just by year, summarize by both year and country, constructing a dataset that shows what fraction of the time each country votes "yes" in each year.
Questo esercizio fa parte del corso
Case Study: Exploratory Data Analysis in R
Istruzioni dell'esercizio
Change the code in the editor to group by both year and country rather than just by year. Save the result as by_year_country.
Esercizio pratico interattivo
Prova a risolvere questo esercizio completando il codice di esempio.
# Group by year and country: by_year_country
votes_processed %>%
group_by(year) %>%
summarize(total = n(),
percent_yes = mean(vote == 1))