Hello again,
Sorry, I've misread your post and thought that you wanted the new dim to
have 'low' and 'high' values.
It's just 'low'. So dim=c(2, 2, 2, 1) and set dn$group to the first
value only.
And forget the final comments.
Rui Barradas
Em 03-06-2012 07:31, Rui Barradas escreveu:
Hello,
Try
a3 <- array(dim=c(2, 2, 2, 2))
dn <- dimnames(a1)
dn$group <- c("low", "high")
dimnames(a3) <- dn
a3[] <- a1 # to use [] keeps the dimensions
a3 # it fills a3 recycling a1 (two copies)
dim(a2)
dim(a3)
As you can see, 'a2' is not of the right dimensions, and 'a3' has now
two copies of 'a1' but it's dimensions are right.
There are ways of giving dimnames to 'a3' other than creating a new
object, 'dn', but this one is a simple one.
Hope this helps,
Rui Barradas
Em 02-06-2012 16:17, Patrick Hausmann escreveu:
Dear list,
I'm trying to add a new dim to a multidimensional array. My array
looks like this
a1 <- array(1:8, c(2, 2, 2))
dimnames(a1) <- list(A = c("A1", "A2"),
B = c("B1", "B2"),
D = c("D1", "D2"))
I would like to add a new dim 'group' with the value "low". Right now
I'm using this, but I think are better ways...
a2 <- as.data.frame(as.table(a1))
a2$group <- "low"
a2 <- xtabs(Freq ~ A + B + D + group, data = a2)
a2
Thanks for any help!
Patrick
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