On Tue, 2007-07-31 at 19:03 +0100, Garavito,Fabian wrote:
> Can I assign names to rows/columns in a i x k x j matrix / dataframe?
You can use an array:
ARR <- array(1:18, c(3, 3, 3),
dimnames = list(LETTERS[1:3], LETTERS[4:6], LETTERS[7:9]))
> ARR
, , G
D E F
A 1 4 7
B 2 5 8
C 3 6 9
, , H
D E F
A 10 13 16
B 11 14 17
C 12 15 18
, , I
D E F
A 1 4 7
B 2 5 8
C 3 6 9
> ARR["B", "E", "H"]
[1] 14
See ?array
By definition, matrices and dataframes are two dimensional, though you
can have a list containing N of them.
HTH,
Marc Schwartz
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