Filtering and arranging
You'll often need to use the pipe operator (%>%) to combine multiple dplyr verbs in a row. In this case, you'll combine a filter() with an arrange() to find the highest population countries in a particular year.
Deze oefening maakt deel uit van de cursus
Introduction to the Tidyverse
Oefeninstructies
- Use
filter()to extract observations from just the year 1957, then usearrange()to sort in descending order of population (pop).
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
library(gapminder)
library(dplyr)
# Filter for the year 1957, then arrange in descending order of population