Add arrows to the lines in the plot
Instead of labeling years, use the arrow argument of the geom_path() call to show the direction of change. The arrows will point from 1996 to 2006, because that's how the data set is ordered. The arrow() function takes two arguments: The first is length, which can be specified with a unit() call, which you might remember from previous exercises. The second is type which defines how the arrow head will look.
Questo esercizio fa parte del corso
Communicating with Data in the Tidyverse
Istruzioni dell'esercizio
- Use the
arrowargument and anarrow()function call to add arrows to each line. - For the arrows, specify a
lengthof1.5"mm"(with aunit()call) and atypeof"closed".
Esercizio pratico interattivo
Prova a risolvere questo esercizio completando il codice di esempio.
ggplot(ilo_data) +
geom_path(aes(x = working_hours, y = country),
# Add an arrow to each path
arrow = ___(___ = ___(___, "___"), ___ = "___"))