R help - Sep 2008 - how to set rownames / colnames for matrices in a list

Hello,

I have another stupid question. I hope you can give me a hint how to solve this:

I have a list and one element is again a list containing matrices, all of the 
same dimensions. Now, I'd like to set the dimnames for all matrices:

example code:

m1 <- matrix(1:25, nrow=5)
m2 <- matrix(26:50, nrow=5)
# ... there can be much more than two matrices

l <- list()
l[[1]] <- list(m1,m2)

r_names <- LETTERS[1:5]
c_names <- LETTERS[6:10]

? how can I apply these names to any number of matrices within this list-list ?

Ciao,
Antje

Hi,

If all your matrices have the same size, you should work with an array 
and not with a list. Then you can use dimnames to set the names of the 
rows, columns, and so on..

Alain

Antje wrote:
> Hello,
>
> I have another stupid question. I hope you can give me a hint how to 
> solve this:
>
> I have a list and one element is again a list containing matrices, all 
> of the same dimensions. Now, I'd like to set the dimnames for all 
> matrices:
>
> example code:
>
> m1 <- matrix(1:25, nrow=5)
> m2 <- matrix(26:50, nrow=5)
> # ... there can be much more than two matrices
>
> l <- list()
> l[[1]] <- list(m1,m2)
>
> r_names <- LETTERS[1:5]
> c_names <- LETTERS[6:10]
>
> ? how can I apply these names to any number of matrices within this 
> list-list ?
>
> Ciao,
> Antje
>
> ______________________________________________
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> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
-- 
Alain Guillet
Statistician and Computer Scientist

Institut de statistique - Universit? catholique de Louvain
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