hotel_bookings %>%
- max(lead_time)
Error in hotel_bookings %>% max(lead_time) : object 'lead_time' not found
hotel_bookings %>%
- summarise(max(lead_time))
A tibble: 1 × 1
max(lead_time)
1 737
hotel_bookings %>%
hotel_bookings %>%
max(lead_time)
1 737
summarise takes responsibility for understanding the data.frame you provided, what columns are in it; when you call max() it gets the lead_time column for you and sends it to max() to calculate on. without summarise, you dont get that behaviour.
the code
hotel_bookings %>% max(lead_time)
is equivalent to
max(hotel_bookings,lead_time)
and not max(hotel_bookings$lead_time)
you could do
hotel_bookings %>% pull(Sepal.Length) %>%max()