Adding a year column
The next step of data cleaning is manipulating your variables (columns) to make them more informative.
In this case, you have a session column that is hard to interpret intuitively. But since the UN started voting in 1946, and holds one session per year, you can get the year of a UN resolution by adding 1945 to the session number.
This exercise is part of the course
Case Study: Exploratory Data Analysis in R
Exercise instructions
Use mutate() to add a year column by adding 1945 to the session column.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Add another %>% step to add a year column
votes %>%
filter(vote <= 3)