Keep/discard elements based on their name/position
keep_at(x, at) discard_at(x, at)
A list or atomic vector.
A logical, integer, or character vector giving the elements to select. Alternatively, a function that takes a vector of names, and returns a logical, integer, or character vector of elements to select.
: if the tidyselect package is
installed, you can use
discard() to keep/discard elements by value.
x <- c(a = 1, b = 2, cat = 10, dog = 15, elephant = 5, e = 10) x %>% keep_at(letters) x %>% discard_at(letters) # Can also use a function x %>% keep_at(~ nchar(.x) == 3) x %>% discard_at(~ nchar(.x) == 3)
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