Comments (1)
DavisVaughan
commented on June 11, 2024
1
The difference of .by vs by is documented here https://dplyr.tidyverse.org/reference/dplyr_by.html#supported-verbs
Luckily most of the time autocomplete can help you figure out which one is supported without having to remember / look that up.
We've tried to error in cases where it is unambiguous (like slice_max), but in the case of reframe() it is perfectly reasonably to construct a new column named by, and it is very likely that many people have called mutate(), summarise(), or reframe() to do exactly this, so we can't turn that into an error. Unfortunately this is just a silent typo that we can't easily tell the user about.
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