Exercise

Split

To calculate the proportions for all years, you will use the function female_residence_prop() defined in the previous exercise along with three other functions:

split(): To "split" the mort data by year
Map(): To "apply" the function female_residence_prop() to each of the subsets returned from split()
Reduce(): To combine the results obtained from Map()

In this exercise, you will "split" the mort data by year.

Instructions

100 XP

Split the row numbers of the mortgage data by the "year" column and assign the result to spl.
Call str() on spl to see the results.