1. Learn
    2. /
  2. Courses
    3. /
  3. Data Manipulation with data.table in R

Exercise

Ordering rows

Ordering aggregated data is quite a common operation. This can be elegantly accomplished by simply chaining data.table expressions together.

Instructions 1/2

undefined XP
    1
    2

Compute the total number of trips grouped by start_station and end_station.