Summarise and mutate multiple columns.
mutate_each() and summarise_each() are deprecated in favour of
the new across() function that works within summarise() and mutate().
summarise_each(tbl, funs, ...) summarise_each_(tbl, funs, vars) mutate_each(tbl, funs, ...) mutate_each_(tbl, funs, vars) summarize_each(tbl, funs, ...) summarize_each_(tbl, funs, vars)
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.