Create a list of functions calls.

funs() provides a flexible way to generate a named list of functions for input to other functions like summarise_at().

funs(..., .args = list())

Arguments

...

A list of functions specified by: Their name, "mean" The function itself, mean A call to the function with . as a dummy argument, mean(., na.rm = TRUE) These arguments are automatically quoted. They support unquoting and splicing. See vignette("programming") for an introduction to these concepts. The following notations are not supported, see examples: An anonymous function, function(x) mean(x, na.rm = TRUE) An anonymous function in purrr notation, ~mean(., na.rm = TRUE)

.args, args

A named list of additional arguments to be added to all function calls. As funs() is being deprecated, use other methods to supply arguments: ... argument in scoped verbs or make own functions with purrr::partial().

Details

Examples

funs(mean, "mean", mean(., na.rm = TRUE))
#> Warning: funs() is soft deprecated as of dplyr 0.8.0
#> Please use a list of either functions or lambdas: 
#> 
#>   # Simple named list: 
#>   list(mean = mean, median = median)
#> 
#>   # Auto named with `tibble::lst()`: 
#>   tibble::lst(mean, median)
#> 
#>   # Using lambdas
#>   list(~ mean(., trim = .2), ~ median(., na.rm = TRUE))
#> This warning is displayed once per session.
#> <fun_calls>
#> $ mean: mean(.)
#> $ mean: mean(.)
#> $ mean: mean(., na.rm = TRUE)

# Override default names
funs(m1 = mean, m2 = "mean", m3 = mean(., na.rm = TRUE))
#> <fun_calls>
#> $ m1: mean(.)
#> $ m2: mean(.)
#> $ m3: mean(., na.rm = TRUE)

# If you have function names in a vector, use funs_
fs <- c("min", "max")
funs_(fs)
#> Warning: funs_() is deprecated. 
#> Please use list() instead
#> This warning is displayed once per session.
#> <fun_calls>
#> $ min: min(.)
#> $ max: max(.)

# Not supported
if (FALSE) {
funs(function(x) mean(x, na.rm = TRUE))
funs(~mean(x, na.rm = TRUE))}