| InternalMethods {base} | R Documentation |
Many R-internal functions are generic and allow methods to be written for.
The following primitive and internal functions are generic,
i.e., you can write methods for them:
length,
length<-,
dimnames,
dimnames<-,
dim,
dim<-,
names,
names<-,
levels<-,
as.character,
as.vector,
is.array,
is.matrix,
is.na,
is.nan,
is.numeric,
rep and
seq.int
(which dispatches methods for "seq").
In addition, is.name is a synonym for is.symbol and
dispatches methods for the latter.
Note that most of the group generic functions are also internal/primitive and allow methods to be written for them.
.S3PrimitiveGenerics is a character vector listing the
primitives which are internal generic and not group generic.
For efficiency, internal dispatch only occurs on objects, that
is those for which is.object returns true.
methods for the methods which are available.