R help - May 2009 - question about setClass

Hi R People:

I have a question about setClass please.  I'm working thru "R
Programming for Bioinformatics".

Actually, I was wondering if there is such a thing as an updateClass,
in order to change a "contains" option, please?

that is, if I had

setClass("dog",
representation(name="character",paws="numeric",tail="character"))


Fair enough.

Later I want to have a class called "pets".

setClass("pets",representation(name="character",total="numeric"))

I want dog to be a subclass of pets.  Do I put in the setClass command
as it stands with the additional contains="pets", or is there an
update form to use, please?

Hope this makes sense.

Thanks,
Sincerely,
Erin


-- 
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com

Erin Hodgess wrote:
> Hi R People:
> 
> I have a question about setClass please.  I'm working thru "R
> Programming for Bioinformatics".
> 
> Actually, I was wondering if there is such a thing as an updateClass,
> in order to change a "contains" option, please?
> 
> that is, if I had
> 
> setClass("dog",
>
representation(name="character",paws="numeric",tail="character"))
> 
> 
> Fair enough.
> 
> Later I want to have a class called "pets".
> 
>
setClass("pets",representation(name="character",total="numeric"))
> 
> I want dog to be a subclass of pets.  Do I put in the setClass command
> as it stands with the additional contains="pets", or is there an
> update form to use, please?

No, you cannot update a class definition.

Best,
Uwe

> Hope this makes sense.
> 
> Thanks,
> Sincerely,
> Erin
> 
>