InternalMethods {base} | R Documentation

## Internal Generic Functions

### Description

Many R-internal functions are generic and allow methods to be written for.

### Details

The following builtin functions are generic as well, i.e., you can write `methods` for them:

`[`, `[[`, `$`, `[<-`, `[[<-`, `$<-`,

`length`, `length<-`,

`dimnames<-`, `dimnames`, `dim<-`, `dim`

`c`, `unlist`,

`as.character`, `as.vector`, `is.array`, `is.atomic`, `is.call`, `is.character`, `is.complex`, `is.double`, `is.environment`, `is.function`, `is.integer`, `is.language`, `is.logical`, `is.list`, `is.matrix`, `is.na`, `is.nan` `is.null`, `is.numeric`, `is.object`, `is.pairlist`, `is.recursive`, `is.single`, `is.symbol`.

### See Also

`methods` for the methods of non-Internal generic functions.

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