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.
Este exercício faz parte do curso
Case Study: Exploratory Data Analysis in R
Instruções do exercício
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.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
# Group by year and country: by_year_country
votes_processed %>%
group_by(year) %>%
summarize(total = n(),
percent_yes = mean(vote == 1))