On 01/27/2011 08:51 PM, Paul Bailey wrote:
> Hi,
>
> I'm trying to make a new S4 object with a slot for a "link-glm" object. R
> doesn't like me have a slot of class "link-glm"
>
>> class(make.link("probit"))
> [1] "link-glm"
Tell the S4 system that you'd like to use this 'old' class
setOldClass("link-glm")
and things should be ok. Martin
>> setClass("a",representation(item="link-glm"))
> [1] "a"
> Warning message:
> undefined slot classes in definition of "a": item(class "link-glm")
>> fa <- function() {
> + new("a",item=make.link("probit"))
> + }>
>> fa()
> Error in validObject(.Object) :
> invalid class "a" object: undefined class for slot "item" ("link-glm")
>
> # and a link-glm looks like a list to me, so I thought I would tell R it is a
> list and see what happens
>
>> setClass("b",representation(item="list"))
> [1] "b"
>> fb <- function() {
> + new("b",item=make.link("probit"))
> + }
>> fb()
> Error in validObject(.Object) :
> invalid class "b" object: invalid object for slot "item" in class "b": got
> class "link-glm", should be or extend class "list"
>
> Any advice?
>
> Regards,
> Paul Bailey
> Ph.D. candidate
> Department of Economics
> University of Maryland
>
> ###### raw code #####
> setClass("a",representation(item="link-glm"))
> fa <- function() {
> new("a",item=make.link("probit"))
> }
> fa()
> setClass("b",representation(item="list"))
> fb <- function() {
> new("b",item=make.link("probit"))
> }
> fb()
> ###########
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