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.
Questo esercizio fa parte del corso
Introduction to the Tidyverse
Istruzioni dell'esercizio
- Use
filter()to extract observations from just the year 1957, then usearrange()to sort in descending order of population (pop).
Esercizio pratico interattivo
Prova a risolvere questo esercizio completando il codice di esempio.
library(gapminder)
library(dplyr)
# Filter for the year 1957, then arrange in descending order of population