Ordering rows
Ordering aggregated data is quite a common operation. This can be elegantly accomplished by simply chaining data.table expressions together.
Diese Übung ist Teil des Kurses
Data Manipulation with data.table in R
Interaktive Übung
Vervollständige den Beispielcode, um diese Übung erfolgreich abzuschließen.
# Compute the total trips grouped by start_station and end_station
trips_dec <- batrips[, ___, by = .(___,
___)]
trips_dec