Editing Data Into Insights (Spring 2021)/R4DS Chapter 5 Exercises (section)

=== 5.5 ===



1.    Currently dep_time and sched_dep_time are convenient to look at, but hard to compute with because they’re not really continuous numbers. Convert them to a more convenient representation of number of minutes since midnight.

2.    Compare air_time with arr_time - dep_time. What do you expect to see? What do you see? What do you need to do to fix it?

3.    Compare dep_time, sched_dep_time, and dep_delay. How would you expect those three numbers to be related?

4.    Find the 10 most delayed flights using a ranking function. How do you want to handle ties? Carefully read the documentation for min_rank().

5.    What does 1:3 + 1:10 return? Why?