[R] how to set rownames / colnames for matrices in a list

[Antje]

Thanks for the hint with the "dimnames". I found a rather similar problem in 
the mailing list solved like this:

x <- matrix(1:4,2)
y <- matrix(5:8,2)

z <- list(x,y)
nm <- c("a","b")
nms <- list(nm,nm)

z <- lapply(z,function(x){
     dimnames(x)<-nms
     x
})

Is there anything wrong using a list instead of an array???

Antje



Alain Guillet schrieb:
> 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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>>
>