[R] naming rows and columns in a matrix

[Gabor Grothendieck]

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> x <- matrix(1:12, 3, 4, dimnames = list(letters[1:3], LETTERS[1:4]))
> x
  A B C  D
a 1 4 7 10
b 2 5 8 11
c 3 6 9 12
> rownames(x)
[1] "a" "b" "c"
> colnames(x)
[1] "A" "B" "C" "D"
> dimnames(x)
[[1]]
[1] "a" "b" "c"

[[2]]
[1] "A" "B" "C" "D"



On Sun, Dec 28, 2008 at 12:43 PM, Math Girl <mathmathgurl at yahoo.com> wrote:
> Hello,
>
> I have a 3 x 7 matrix.  I want to assign a name to each row
> and each column.  I tried using
> dimnames, but for some reason I cannot retrieve the names of the rows or the names
> of the columns.  Is there another way to name the rows and columns and refer to them?
>
>
>
>        [[alternative HTML version deleted]]
>
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