On Tue, 7 Aug 2001 htang@hpl.hp.com wrote:
Full_Name: Hsiu-Khuern Tang
Version: 1.3.0
OS: GNU/Linux (Debian unstable)
Submission from: (NULL) (192.6.19.124)
Hi all,
I am not sure this is a bug rather than an intentional design, but here
goes:
None of the above.
If I do
a <- matrix(1:4, nrow=2)
dimnames(a)[[1]] <- c("a", "b")
I get the following error message because dimnames(a) is NULL: Error: more elements supplied than there are to replace
Which is a correct error message.
What is the proper way to do this?
rownames(a) <- c("a", "b")
I know this works:
dimnames(a) <- list(c("a", "b"), NULL)
Incidentally, in SPlus, I can assign to NULL dimnames.
Really? Your own example fails in the versions I have to hand: S-PLUS 3.4 gives
dimnames(a)[[1]] <- c("a", "b")
Error in dimnames(a) <- .A0: data of mode character can't be used as
dimnames
(need a list)
In addition: Warning messages:
Replacement length not a multiple of number of elements to replace in:
.A0[[1
]] <- .A1
Dumped
and S-PLUS 6.0 gives
dimnames(a)[[1]] <- c("a", "b")
Problem in dimnames(a) <- .A0: Invalid length (1) for dimnames attribute; needs to be 2
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 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._