Exercise

# Olympic medals per continent

You want to compare Olympic performance of athletes per continent over time, both on the winter and summer Olympics. You've been given a dataset `medal_df`

with the average number of medals won per participant of each continent since 1928. You'll complete this data to introduce zero values for years where a continent did not win any medals.

The `ggplot2`

package has been pre-loaded for you.

Instructions

**100 XP**

- Complete the dataset so that each
`continent`

has a`medals_per_participant`

value at each Olympic event. Missing values should be filled with zeros. - Nest the
`season`

and`year`

variables using the`nesting()`

function, since the summer and winter Olympics don't occur in the same years. - Use
`ggplot()`

to create a line plot with the`medals_per_participant`

per`year`

, color the plot by`continent`

.