[R] getAttr problem
tsvetan.stoyanov at mirant.com
Fri May 9 17:03:10 CEST 2003
it is trivial, it in in the R function, it has as.double which removes the names.
Anyhow, the example in the text should be clarified.
From: Prof Brian Ripley [mailto:ripley at stats.ox.ac.uk]
Sent: Friday, May 09, 2003 10:44 AM
To: Stoyanov, Tsvetan
Cc: 'r-help at stat.math.ethz.ch'
Subject: Re: [R] getAttr problem
On Fri, 9 May 2003, Stoyanov, Tsvetan wrote:
> It seems that getAttr doesn't return "names" attribute properly as in
Is this getAttrib?
> getAttrib(x, R_NamesSymbol));
Really? As it is widely used inside R, that seems implausible.
> If you look at section 4.7.4 in "Writing R Extensions", the second example of
> SEXP out(SEXP, SEXP) returns NULL for the names attribute of the
> outer product.
But the outer product is a matrix and does not have names, so NULL is
> This is true for R 1.7.0 on both Win2000 with mingw and Redhat 9.0 with gcc.
Well, the source code is the same for both systems, so that is not
surprising (and BTW `mingw' is on ix86 port of gcc, and RH9 (no .0?)
uses another ix86 port of gcc).
> Is there something I am missing?
Yes: could you supply a complete example with the results you get and an
explanation as to why you think it is wrong?
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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