Computing multiple stats
Let's now combine everything from the past two exercises to find multiple summary statistic with multiple groups in batrips.
Bu egzersiz
Data Manipulation with data.table in R
kursunun bir parçasıdırUygulamalı interaktif egzersiz
Bu örnek kodu tamamlayarak bu egzersizi bitirin.
# Compute mean of duration and total trips grouped by start and end stations
aggregate_mean_trips <- batrips[, ___, ___]
aggregate_mean_trips