[R] Is there a (virtual) class that all R objects inherit from?

[Martin Morgan]

On 06/03/2011 01:53 AM, Janko Thyson wrote:
> On 31.05.2011 18:17, Martin Morgan wrote:
>> On 05/30/2011 07:02 AM, Janko Thyson wrote:
>>> Dear list,
>>>
>>> I would like to set one specific Reference Class field to be of an
>>> arbitrary class. Is there a class that all R objects inherit from? I
>>> thought that "ANY" was something like this, but obviously that's not
>>> true:
>>>
>>> > inherits(1:3, "ANY")
>>> [1] FALSE
>>
>> I can't speak to the implementation, but ANY functions as a base class
>> in terms of slot / field assignment and inheritance, e.g.,
>>
>> setClass("A", representation(x="ANY"))
>> new("A", x=1:3)
>>
>> Martin
>
> Hi Martin,
>
> sorry for the late response. The way you do it works. Yet, when you
> declare dependencies more explicitly (contains=XY), then R complains. Is
> this a feature or a bug (with respect to the "less explicit" way working
> just fine)? See the example below:
>
> # S4
> setClass("A", representation(x="ANY"))
> new("A", x=1:3)
>
> setClass("A", representation(x="ANY"))
> setClass("B", contains="A", representation(x="character"))
> new("B", x=1:3)
>
> # Reference Classes
> setRefClass(
> Class="A",
> fields=list(
> .PRIMARYDATA="ANY"
> ),
> contains=c("VIRTUAL")
> )
> B <- setRefClass(
> Class="B",
> fields=list(
> .PRIMARYDATA="character"
> ),
> contains=c("A")
> )

Bug, I'd say. Martin

>
> Regards,
> Janko
>>>
>>> Regards,
>>> Janko
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
>
>
> --
> ------------------------------------------------------------------------
>
> *Janko Thyson*
> janko.thyson at googlemail.com <mailto:janko.thyson at googlemail.com>
>
> Jesuitenstraße 3
> D-85049 Ingolstadt
>
> Mobile: +49 (0)176 83294257
>
> This e-mail and any attachment is for authorized use by the intended
> recipient(s) only. It may contain proprietary material, confidential
> information and/or be subject to legal privilege. It should not be
> copied, disclosed to, retained or used by any other party.
> If you are not an intended recipient then please promptly delete this
> e-mail and any attachment and all copies and inform the sender.
>


-- 
Computational Biology
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N. PO Box 19024 Seattle, WA 98109

Location: M1-B861
Telephone: 206 667-2793