.drop missing in Usage of ?count

[LukasWallrich]

Maybe I misunderstand the Usage section, but it seems to me that .drop should be in the Usage section of ?count ... when I searched for a way to keep empty levels, I first looked there and then initially gave up on using count()

[eipi10]

.drop isn't included in the usage section of the help, which is probably an oversight that should be corrected, but count does accept a .drop argument (see the reprex below for an example). If you scroll down a bit further in the help for count, there's documentation for the .drop argument and its usage in count.

library(tidyverse)

d = mtcars

d = d %>% mutate(cyl = fct_expand(factor(cyl), "10")) 
levels(d$cyl)
#> [1] "4"  "6"  "8"  "10"

d %>% count(cyl)
#>   cyl  n
#> 1   4 11
#> 2   6  7
#> 3   8 14

d %>% count(cyl, .drop=FALSE)
#>   cyl  n
#> 1   4 11
#> 2   6  7
#> 3   8 14
#> 4  10  0

^{Created on 2023-04-12 with reprex v2.0.2}

[nstjhp]

You're right and I've been bitten by this before when quickly scanning function arguments to find if count could do what I wanted. I think it was just forgotten about when the tidyverse team made the function generic in 2020 (#5633). If the team have time to correct this, it would also be nice to add an example with the .drop argument in the Examples section to increase its visibility.