[R] Creating list from matrix

Dimitris Rizopoulos d.rizopoulos at erasmusmc.nl
Wed Oct 22 13:10:31 CEST 2008


try this:

mat <- matrix(rnorm(12*3), 3)

n <- nrow(mat)
p <- ncol(mat)
ind <- rep(1:4, each = n*p/4)
lapply(split(mat, ind), matrix, nrow = n)


I hope it helps.

Best,
Dimitris


Ron Michael wrote:
> Hello everyone,
> Â 
> I have a matrix like :
> Â 
> mat <- matrix(rnorm(12*3), 3)
> Â 
> Now I want to break that matrix in 4 parts each of them are matrix of (3x3) and put those 4 matrices in a "list" object of length 4
> Â 
> Can anyone please tell me how to do that?
> 
> 
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-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

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