[R] Accessing just the value of an object but not the attributes
Prof Brian D Ripley
ripley at stats.ox.ac.uk
Sat Oct 6 16:36:19 CEST 2001
On Tue, 2 Oct 2001, Johann Petrak wrote:
> I see the role of as.vector().
> But even if as.vector() needs to keep its attribute-dropping
> side-effect for compatibility reasons, wouldn't
> a dropattr() still be a good idea?
Not needed, as
attributes(x) <- NULL
removes all attributes. I have no idea why this might be useful to you
.. remember that class and dim are attributes, for example.
Because they are not normally visible, assignment functions like
attributes<- are too little appreciated in S programming.
> For instance, I can assign attributes to closures, but
> wont get rid of them using as.vector() - and neither
> using as.function() by the way ...
> So if I dont know in advance what kind of object it is
> and I do want to just access the "value" in any case
> I have to check the type ... ?
Brian D. Ripley, ripley at stats.ox.ac.uk
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 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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