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")
)
Regards,
Janko
>>
>> Regards,
>> Janko
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
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>> PLEASE do read the posting guide
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>> and provide commented, minimal, self-contained, reproducible code.
>
>
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