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:
x[[c("some label", "some other index")]] <- 3
This assumes that x is a list, and one of its entries is a list named
"some label". It will not create that entry, but it will create an
entry named "some other index", so you need
if (is.null(x[["some label"]])) x[["some label"]] <- list()
first. After executing this line and your first line above, you'll get
> x
$`some label`
$`some label`$`some other index`
[1] 3
Duncan Murdoch
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