[Rd] Replacing slot of S4 class in method of S4 class?
Simon Urbanek
simon.urbanek at r-project.org
Fri Mar 30 23:04:55 CEST 2007
Please read the posting guide and use the appropriate mailing list (R-
help) - your question has nothing to do with the development of R.
Cheers,
Simon
PS: look closely at your code - your mymethod is a noop.
On Mar 30, 2007, at 4:45 PM, cstrato wrote:
> Dear all,
>
> Assume that I have an S4 class "MyClass" with a slot "myname", which
> is initialized to: myname="" in method("initialize"):
> myclass <- new("MyClass", myname="")
>
> Assume that class "MyClass" has a method "mymethod":
> "mymethod.MyClass" <-
> function(object, myname=character(0), ...) {
> object at myname <- myname;
> #or: myName(object) <- myname
> }
> setMethod("mymethod", "MyClass", mymethod.MyClass);
>
> Furthermore, I have a replacement method:
> setReplaceMethod("myName", signature(object="MyClass",
> value="character"),
> function(object, value) {
> object at myname <- value;
> return(object);
> }
> )
>
> I know that it is possible to call:
> myName(myclass) <- "newname"
>
> However, I want to replace the value of slot "myname" for object
> "myclass"
> in method "mymethod":
> mymethod(myclass, myname="newname")
>
> Sorrowly, the above code in method "mymethod" does not work.
>
> Is there a possibility to change the value of a slot in the method
> of a
> class?
>
> Best regards
> Christian
> _._._._._._._._._._._._._._._._
> C.h.i.s.t.i.a.n S.t.r.a.t.o.w.a
> V.i.e.n.n.a A.u.s.t.r.i.a
> _._._._._._._._._._._._._._._._
>
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