More iteration with purrr
Now you will change each element of a list into a numeric data type and then put it back into the same element in the same list, but instead of using a for loop, you'll use map().
You can use the purrr function map() to more easily loop over a list, and turn the characters into numbers. Instead of having to build a whole for loop, you can use one line of code.
Cet exercice fait partie du cours
Foundations of Functional Programming with purrr
Instructions
- Check the class of the first element of
list_of_df. - Use
map()to iterate overlist_of_dfand change each element of the list into numeric data. - Check the class of the first element of
list_of_df. - Print out
list_of_df.
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
# Check the class type of the first element
class(___[[___]])
# Change each character element to a number
list_of_df <- map(___, ___)
# Check the class type of the first element again
class(___[[___]])
# Print out the list