dplyr (version 1.0.10)

group_by_all: Group by a selection of variables



Scoped verbs (_if, _at, _all) have been superseded by the use of across() in an existing verb. See vignette("colwise") for details.

These scoped variants of group_by() group a data frame by a selection of variables. Like group_by(), they have optional mutate semantics.


  .funs = list(),
  .add = FALSE,
  .drop = group_by_drop_default(.tbl)

group_by_at( .tbl, .vars, .funs = list(), ..., .add = FALSE, .drop = group_by_drop_default(.tbl) )

group_by_if( .tbl, .predicate, .funs = list(), ..., .add = FALSE, .drop = group_by_drop_default(.tbl) )



A tbl object.


A function fun, a quosure style lambda ~ fun(.) or a list of either form.


Additional arguments for the function calls in .funs. These are evaluated only once, with tidy dots support.


See group_by()


Drop groups formed by factor levels that don't appear in the data? The default is TRUE except when .data has been previously grouped with .drop = FALSE. See group_by_drop_default() for details.


A list of columns generated by vars(), a character vector of column names, a numeric vector of column positions, or NULL.


A predicate function to be applied to the columns or a logical vector. The variables for which .predicate is or returns TRUE are selected. This argument is passed to rlang::as_function() and thus supports quosure-style lambda functions and strings representing function names.

Grouping variables

Existing grouping variables are maintained, even if not included in the selection.


Run this code
# Group a data frame by all variables:
# ->
mtcars %>% group_by(across())

# Group by variables selected with a predicate:
group_by_if(iris, is.factor)
# ->
iris %>% group_by(across(where(is.factor)))

# Group by variables selected by name:
group_by_at(mtcars, vars(vs, am))
# ->
mtcars %>% group_by(across(c(vs, am)))

# Like group_by(), the scoped variants have optional mutate
# semantics. This provide a shortcut for group_by() + mutate():
d <- tibble(x=c(1,1,2,2), y=c(1,2,1,2))
group_by_all(d, as.factor)
# ->
d %>% group_by(across(everything(), as.factor))

group_by_if(iris, is.factor, as.character)
# ->
iris %>% group_by(across(where(is.factor), as.character))

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