RE: vector()

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Subject: RE: vector()
From: Prof Brian D Ripley (ripley@stats.ox.ac.uk)
Date: Mon 19 Jul 1999 - 17:18:33 EST


Message-ID: <Pine.GSO.4.05.9907190817150.16539-100000@auk.stats>

On Mon, 19 Jul 1999, Venables, Bill (CMIS, Cleveland) wrote:

> You might think about using structure()
>
> fred <- structure(vector("list", length(happy)), names = names(happy))
>
> and in fact you can add as many attributes as you like. This seems a better
> plan than tweaking vector() (where do you stop?) and maintains consistency
> with S3 at this low level.
>
> It must be said, though, this natural and innocent looking idiom that I once
> used quite a lot in S3 code had nasty consequences in going from S3 to S4,
> (as BDR frequently reminds me!)

(When used for setting classes instead of class<-, that is.)

-- 
Brian D. Ripley,                  ripley@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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