Filtering for one country and one year
You can also use the filter() verb to set two conditions, which could retrieve a single observation.
Just like in the last exercise, you can do this in two lines of code, starting with gapminder %>% and having the filter() on the second line. Keeping one verb on each line helps keep the code readable. Note that each time, you'll put the pipe %>% at the end of the first line (like gapminder %>%); putting the pipe at the beginning of the second line will throw an error.
This exercise is part of the course
Introduction to the Tidyverse
Exercise instructions
- Filter the
gapminderdata to retrieve only the observation from China in the year 2002.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
library(gapminder)
library(dplyr)
# Filter for China in 2002