Ok, apologies.
On Oct 12, 2012, at 2:52 AM, Markku Karhunen wrote:
Hi all,
I've been wondering for a long time why R drops the dimensions of
an array/matrix when you try to take a subset of one column. I mean
this:
dim(A)
[1] 2 5 2
B=A[1,,]
dim(B)
5 2 # so now dim(B)[3] doesn't work
C=B[2,]
dim(C)
NULL # so now nrow(C) doesn't work
Typically, you can get rid of this by writing as.matrix,
as.array(...) but that generates extra lines of code. This is
really annoying. Does anybody know how to turn this behaviour off?
Read the help page for:
?"[" # especially regarding the drop parameter.
--
David Winsemius, MD
Alameda, CA, USA
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