removeMethods
Remove all the Methods for a Function

Description

Remove all the registered methods for a function.

Usage

removeMethods(f, where = topenv(parent.frame()), all = missing(where))
removeMethod(f, signature = character(), where = topenv(parent.frame())) 
removeGeneric(f, where = topenv(parent.frame()))

Arguments

f a character string. The name of the generic function.
where the attached package from which to remove the methods.
all a logical value. This argument is not supported in Spotfire Enterprise Runtime for R.
signature a character string. The signature of the method to remove. If signature is not supplied, remove the default method.
Value
returns TRUE if methods are removed successfully; otherwise it returns FALSE.
Side effects
removeMethod Removes a single method from the generic function.
removeMethods Removes the generic function named f and all its methods from the package where. If the variable f in the environment where contains a generic function, all of the generic function's methods are removed. If f has a default method, then the variable f is set to an ordinary function derived from the default method of the generic.
removeGeneric("f") The same as removeMethods, except that it always removes the variable f, rather than setting it to an ordinary function.
See Also
setGeneric, showMethods.
Examples
# remove foo and reset it to the default method 
foo <- function(x) "original non-generic foo"
setGeneric("foo", function(x) standardGeneric("foo"))
setMethod("foo", "integer", function(x) "integer method for foo")
setMethod("foo", "character", function(x) "character method for foo")
setMethod("foo", "numeric", function(x) "numeric method for foo")
foo(as.integer(1))
# [1] "integer method for foo"
foo(as.numeric(1))
# [1] "numeric method for foo"
removeMethod("foo", "integer")
# [1] TRUE
foo(as.integer(1))
# [1] "numeric method for foo"
removeMethods("foo") 
foo(as.integer(1))
# [1] "original non-generic foo"

foo <- function(x) "original non-generic foo" setGeneric("foo", function(x) standardGeneric("foo")) setMethod("foo", "integer", function(x) "integer method for foo") removeGeneric("foo") # [1] TRUE exists("foo", inherits=FALSE) # [1] FALSE

Package methods version 6.1.4-13
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