R: Register S3 Methods (original) (raw)
| S3method {base} | R Documentation |
|---|
Description
Register S3 methods in R scripts.
Usage
.S3method(generic, class, method)
Arguments
| generic | a character string naming an S3 generic function. |
|---|---|
| class | a character string naming an S3 class. |
| method | a character string or function giving the S3 method to be registered. If not given, the function namedgeneric.class is used. |
Details
This function should only be used in R scripts: for package code, one should use the corresponding ‘S3method’ ‘NAMESPACE’ directive.
Examples
## Create a generic function and register a method for objects
## inheriting from class 'cls':
gen <- function(x) UseMethod("gen")
met <- function(x) writeLines("Hello world.")
.S3method("gen", "cls", met)
## Create an object inheriting from class 'cls', and call the
## generic on it:
x <- structure(123, class = "cls")
gen(x)
[Package _base_ version 4.6.0 Index]