Mutate multiple columns simultaneously

Deprecated

Mutate multiple columns simultaneously.

mutate_across.(
  .df,
  .cols = everything(),
  .fns = NULL,
  ...,
  .by = NULL,
  .names = NULL
)

Arguments

.df

A data.frame or data.table

.cols

vector c() of unquoted column names. tidyselect compatible.

.fns

Functions to pass. Can pass a list of functions.

...

Other arguments for the passed function

.by

Columns to group by

.names

A glue specification that helps with renaming output columns. {.col} stands for the selected column, and {.fn} stands for the name of the function being applied. The default (NULL) is equivalent to "{.col}" for a single function case and "{.col}_{.fn}" when a list is used for .fns.

Examples

if (FALSE) {
df <- data.table(
  x = rep(1, 3),
  y = rep(2, 3),
  z = c("a", "a", "b")
)

df %>%
  mutate_across.(where(is.numeric), as.character)

df %>%
  mutate_across.(c(x, y), ~ .x * 2)

df %>%
  mutate_across.(everything(), as.character)

df %>%
  mutate_across.(c(x, y), list(new = ~ .x * 2,
                               another = ~ .x + 7))
df %>%
  mutate_across.(
    .cols = c(x, y),
    .fns = list(new = ~ .x * 2, another = ~ .x + 7),
    .names = "{.col}_test_{.fn}"
  )
}