scale2 <- function(x, na.rm = FALSE) (x - mean(x, na.rm = na.rm)) / sd(x, na.rm) starwars %>% mutate_at(c("height", "mass"), ~scale2(., na.rm = TRUE)) # -> starwars %>% mutate(across(c("height", "mass"), ~ scale2(.x, na.rm = TRUE)))
I'm interested in why
.x is used with
. is still used for the scoped verbs.
.x is also used with
across() in the colwise article and elsewhere.
.x is intended for functions with two arguments, but
.y isn't needed or used here. Is the usage of
.x more than stylistic? I haven't yet come up with a case which yields different results for
. or which causes a naming collision between the
. inside the lambda function and the
. that is piped into
I'm aware of the discussion here but I think this question is distinct. Apologies if I have missed something in the documentation that addresses this.