Clean up your data with keep

Since the beginning of this course, we have been using the results of a weeklong A/B test.

We have put these results in a list called all_visits. This list contains visit_a, visit_b, and visit_c. These vectors are unnamed. They all contain seven numbers, one for each day of the week.

The first question we want to ask is: which days reached more than 100 visits an hour on average? We will use the keep() function. But the answer would not be readable with an unnamed vector: you would have the numbers, but you would not know to which day these numbers correspond.

The good news is: you can use the set_names() function to solve this issue. This is what we'll do in this chapter: first, use keep() on unnamed vectors, then on named ones.

Create a mapper that will test if .x is more than 100. You'll use it twice.
Combining this mapper with keep(), and map it on the unnamed list all_visit. As the result is unnamed, you don't know which days you have kept.
Name each vector by combining map() and the set_names() functions, using the vector of names we have provided.
Map the previously created mapper on the newly named list. As you can see, it's more readable now!

Exercise

Clean up your data with keep

Instructions