Mutate multiple columns simultaneously
Mutate multiple columns simultaneously.
mutate_across.( .df, .cols = everything(), .fns = NULL, ..., .by = NULL, .names = NULL )
.df |
A data.frame or data.table |
.cols |
vector |
.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.
|
test_df <- data.table(
x = rep(1, 3),
y = rep(2, 3),
z = c("a", "a", "b")
)
test_df %>%
mutate_across.(where(is.numeric), as.character)
test_df %>%
mutate_across.(c(x, y), ~ .x * 2)
test_df %>%
mutate_across.(everything(), as.character)
test_df %>%
mutate_across.(c(x, y), list(new = ~ .x * 2,
another = ~ .x + 7))
test_df %>%
mutate_across.(
.cols = c(x, y),
.fns = list(new = ~ .x * 2, another = ~ .x + 7),
.names = "{.col}_test_{.fn}"
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