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.
This exercise is part of the course
Case Study: Exploratory Data Analysis in R
Exercise instructions
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.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Group by year and country: by_year_country
votes_processed %>%
group_by(year) %>%
summarize(total = n(),
percent_yes = mean(vote == 1))