Hi,
Is it intended to support assignment of a derived instance (S3) to a parent container
(S4)?
setClass("any")
setClass("myclass",representation(x="any",y="any")) # I define parent containers x,y
#I have an S3 object.
xx<-3
class(x)
#instantiate a new object of class myclass
tt<-new("myclass")
[EMAIL PROTECTED]<-xx #not allowed as expected.
# I want to assign xx anyway. This should be possible if xx inherits class "any".
This can be easily achieved by ?class.
class(xx)<-c(class(xx),"any")
class(xx) #now it is of class "any"
[EMAIL PROTECTED] <- xx #but it still can not be assigned to the parent container.
#The same works for 'pure' S4 classes.
setClass("Numeric",contains="any")
xx<-new("Numeric")
is(xx)
[EMAIL PROTECTED]<-xx #works.
Is it intended to support S3 class inheritance within S4? It would be great because
most of the objects in R are still S3.
Yours
/E
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