On Thu, 17 Feb 2005, Iago Mosqueira wrote:
On Thu, 2005-02-17 at 12:32, Prof Brian Ripley wrote:
and you are talking about *names of* dimnames).
Sorry for the confusion.
It `works' for arrays because the definition there (in ?Extract) is not the same as the generic you are using: notice the ... in the definitions, and for arrays it is really "["(x, ..., drop=TRUE) and the names of ... are ignored.
Thanks. I did realise for arrays the names are ignored, but in the new class they are not even accepted.
so argument names are ignored for the primitives, but not for S3 methods (and I believe not for S4 methods).
I am afraid I fail to see then why my example code fails to accept names when subsetting. Shouldn't a class that extends "array" inherit this behaviour too?
No, it inherits from the S4 pseudo-method for "array", not the primitive.
Remember that S4 methods are bolted on to a different system, and bridging the gaps where possible has been very hard work (by John Chambers).
-- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
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