Used inside mutate() or summarise() to apply a function to multiple
columns selected with tidyselect. Returns a named list of expressions.
Usage
across(.cols, .fns, ..., .names = NULL)
Arguments
- .cols
Column selection (tidyselect).
- .fns
A function, formula, or named list of functions.
- ...
Additional arguments passed to .fns.
- .names
A glue-style naming pattern. Uses {.col} and {.fn}.
Default: "{.col}" if .fns is a single function,
"{.col}_{.fn}" if .fns is a named list.
Value
A named list used internally by mutate/summarise.
Examples
f <- tempfile(fileext = ".vtr")
write_vtr(mtcars, f)
# In summarise (conceptual; across is expanded to individual expressions)
unlink(f)