Check Function
Checks if is a function using
is.function(x) && (is.null(formals) || length(formals(x)) == formals)
chk_function(x, formals = NULL, x_name = NULL) vld_function(x, formals = NULL)
x |
The object to check. |
formals |
A count of the number of formal arguments. |
x_name |
A string of the name of object x or NULL. |
The chk_ function throws an informative error if the test fails.
The vld_ function returns a flag indicating whether the test was met.
vld_function: Validate Function
Other chk_is:
chk_array(),
chk_atomic(),
chk_data(),
chk_is(),
chk_matrix(),
chk_numeric(),
chk_s3_class(),
chk_s4_class(),
chk_vector(),
chk_whole_numeric()
# chk_function chk_function(mean) try(chk_function(1)) # vld_function vld_function(mean) vld_function(function(x) x) vld_function(1) vld_function(list(1))
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.