cbind is not generic as claimed, omits labels where S has them (PR#239)

[ihaka@stat.auckland.ac.nz]

On Fri, Aug 06, 1999 at 12:08:05AM +0200, Peter Dalgaard BSA wrote:
> Ross Ihaka <ihaka@stat.auckland.ac.nz> writes:
> 
> I played around with this earlier today. There's nothing special about
> dataframes, S does the same with any classed object. I.e.
> 
> class(b)<-"my"
> cbind.my<-function(...)match.call()
> 
> cbind(a,b)
> 
> will dispatch cbind.my

I played some more.  I think data frames are special somehow.

	S> x <- factor(1:10)
	S> y <- data.frame(1:10)
	> class(x)
	[1] "factor"
	S> class(y)
	[1] "data.frame"
	S> class(cbind(x,y))
	[1] "data.frame"
	S> class(cbind(y,x))
	[1] "data.frame"

They seem to overpower other class arguments too.

	Ross


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