On 24 Feb 2004 at 21:38, Uwe Ligges wrote:
setClass("myclass", representation("ANY", x = "numeric", y ="numeric"))
new("myclass", 1:10) # works new("myclass", "Test") # works new("myclass", factor(1:10)) # fails
Why do you think it fails?
I was typing faster than thinking. It doesn't actually fail but what I get is a numeric vector with a levels attribute. If I specify a factor as .Data part I expect that the created object IS a factor and is.factor(new("myclass", factor(1:10))) returns TRUE.
So you are going to handle/mix the S4 class like/with S3 classes? Hmm. It can be either of class "myclass" or of class "factor". I'd define a separate explicit slot for such a class:
setClass("myclass", representation(mainSlot = "ANY",
x = "numeric", y = "numeric"))John Chambers might want to correct me...
Uwe
It works perfectly for me with R-1.8.1 for Windows. You haven't told anything about your R version, I suspect your are using an outdated one.
Sorry, forgot that one. I'm also using R 1.8.1 on Windows.
Thanks,
Torsten
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