Combining filter, mutate, and arrange

In this exercise, you'll combine all three of the verbs you've learned in this chapter, to find the countries with the highest life expectancy, in months, in the year 2007.

Deze oefening maakt deel uit van de cursus

Introduction to the Tidyverse

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Oefeninstructies

In one sequence of pipes on the gapminder dataset:
filter() for observations from the year 2007,
mutate() to create a column lifeExpMonths, calculated as 12 * lifeExp, and
arrange() in descending order of that new column

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

library(gapminder)
library(dplyr)

# Filter, mutate, and arrange the gapminder dataset

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