On 24/04/2009 8:48 AM, hadley wickham wrote:
On Fri, Apr 24, 2009 at 5:50 AM, Duncan Murdoch <murd...@stats.uwo.ca> wrote:
Toby wrote:
I'm trying to figure out how I can get a generalized 2D
list/array/matrix/whatever
working. Seems I can't figure out how to make the variables the right
type. I
always seem to get some sort of error... out of bounds, wrong type, wrong
dim, etc.
Very confused... :)
x[["some label", "some other index"]] <- 3
x[["some other label", "something else"]] <- 4
I don't know the indexes/label ahead of time... they get generated... Any
thoughts?
What you have there is not legal syntax, but this would be:
It isn't?
You're right, it is. Sorry.
However, I think the solution I gave (not to make the list into an
array, but rather to use a list of lists) is probably better in a lot of
situations where the indices show up unpredictably.
Duncan Murdoch
a <- as.list(1:4)
dim(a) <- c(2, 2)
rownames(a) <- c("a", "b")
colnames(a) <- c("c", "d")
a[["a", "d"]]
Hadley
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