Prof Brian Ripley wrote:
> On Mon, 17 Apr 2006, Paul Gilbert wrote:
>
>> Ok, but I'm surprised. I thought partial matching only happened for
>> named arguments. I guess I've been lucky.
>
> Here C is named, so what did you mean?
Now I guess I've really been confused. I thought named arguments in a
function were the optional ones you named when you define the function
(with name=default, so Class is not a named argument in the call to
new). Are you saying the named arguments are the ones you name when you
call the function?
Paul
>
> Partial matching happens for all arguments called by name, except for
> those following ... in the formals.
>
>>
>> Paul
>>
>> Prof Brian Ripley wrote:
>>> It's an error in your usage The args of new() are
>>>
>>>> args(new)
>>> function (Class, ...)
>>>
>>> and what does 'C' match? You need to name your arguments here.
>>>
>>> On Mon, 17 Apr 2006, Paul Gilbert wrote:
>>>
>>>> "C" appears to be an illegal name for a slot in an S4 class (example
>>>> below).
>>>
>>> It is rather an example of something which does not work.
>>>
>>> foo <- new("testobj")
>>> [EMAIL PROTECTED] <- 2
>>>
>>> does, for example.
>>>
>>>> If this is a known limitation, and not a bug, it would be nice
>>>> if it were caught by setClass.
>>>>
>>>> Paul Gilbert
>>>>
>>>>> setClass("testobj", representation ( C = "numeric"))
>>>> [1] "testobj"
>>>>> new("testobj", C= 2)
>>>> Error in methodsPackageMetaName("C", name) :
>>>> 'The name of the object (e.g,. a class or generic function) to
>>>> find in the meta-data' must be a single string (got an object of class
>>>> "numeric")
>>>>
>>>>> setClass("testobj", representation ( C. = "numeric"))
>>>> [1] "testobj"
>>>>> new("testobj", C.= 2)
>>>> An object of class "testobj"
>>>> Slot "C.":
>>>> [1] 2
>>>> ====================================================================================
>>>>
>>>>
>>>>
>>>>
>>>> La version française suit le texte anglais.
>>>>
>>>> ------------------------------------------------------------------------------------
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>>
>>>
>> ====================================================================================
>>
>>
>>
>> La version française suit le texte anglais.
>>
>> ------------------------------------------------------------------------------------
>>
>>
>>
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>>
>
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