[R] Generalized 2D list/array/whatever?

[hadley wickham]

On Fri, Apr 24, 2009 at 5:50 AM, Duncan Murdoch <murdoch at 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?

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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