Re: [Rd] Problem with _new_ if class "lm" in object representatio n.

Thu, 30 Sep 2004 06:25:10 -0700 

Hi,

Yes indeed. Thanks.

Yours



Eric Lecoutre wrote:


Hi,

For your lm problem, you could begin to create a virtual class that accepts either NULL or a lm object:

> setClassUnion("mylm", c("NULL","lm"))
> setClass("foo", representation(x="numeric", y="mylm"))
> new("foo",x=1,y=NULL)

Then, you have to check the content of slot y in any function that will manipulate objects of class "foo":


        setMethod("show","foo",function(object)
        {
        cat("\n object of class foo")
        if (!is.null([EMAIL PROTECTED])) cat(" does have a lm object in slot y!")
        })


Eric



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tel: 0049-30-83875219 'v'
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