Summarizing the median life expectancy
You've seen how to find the mean life expectancy and the total population across a set of observations, but mean()
and sum()
are only two of the functions R provides for summarizing a collection of numbers. Here, you'll learn to use the median()
function in combination with summarize()
.
By the way, dplyr
displays some messages when it's loaded that we've been hiding so far. They'll show up in red and start with:
Attaching package: 'dplyr'
The following objects are masked from 'package:stats':
This will occur in future exercises each time you load dplyr
: it's mentioning some built-in functions that are overwritten by dplyr
. You won't need to worry about this message within this course.
This exercise is part of the course
Introduction to the Tidyverse
Exercise instructions
- Use the
median()
function within asummarize()
to find the median life expectancy. Save it into a column calledmedianLifeExp
.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
library(gapminder)
library(dplyr)
# Summarize to find the median life expectancy