walk() for printing cleaner list outputs
Now you will try one more use of walk(), specifically creating plots using walk(). In the previous exercise, you printed some lists, and you saw that printing lists is much cleaner using walk() than using the base R way. You can also use walk() to display multiple plots sequentially.
Here, use your map() knowledge along with ggplot2 functions to create a graph for the first ten elements of gap_split and then display each graph with walk().
This exercise is part of the course
Foundations of Functional Programming with purrr
Exercise instructions
- Load the
gap_splitdataset. map2()over the first 10 elements ofgap_split, and the first 10 names ofgap_split.- Then
walk()over the new plots object and supplyprint()as an argument to print all plots.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Load the gap_split data
data(___)
# Map over the first 10 elements of gap_split
plots <- map2(___[1:10],
names(___[1:10]),
~ ggplot(___, aes(year, lifeExp)) +
geom_line() +
labs(title = ___))
# Object name, then function name
walk(___, ___)