Hello,
Try using ?lapply, its return value is a list. Note however that the
*apply functions are loops in disguise. There's nothing wrong with your
solution to the problem, but it's true that most R users find lapply
more elegant, like you say.
hold <- lapply(1:5, function(x) matrix(rnorm(4),2,2) )
Hope this helps,
Rui Barradas
Em 09-11-2016 18:32, Evan Cooch escreveu:
So, its easy enough to create a random matrix, using something like (say)
matrix(rnorm(4),2,2)
which generates a (2x2) matrix with random N(0,1) in each cell.
But, what I need to be able to do is create a 'list' of such random
matrices, where the length of the list (i.e., the number of said random
matrices I store in the list) is some variable I can pass to the
function (or loop).
I tried the obvious like
hold <- list()
for (i in 1:5) {
hold[[i]] <- matrix(rnorm(4),2,2)
}
While this works, it seems inelegant, and I'm wondering if there is a
better (more efficient) way to accomplish the same thing -- perhaps
avoiding the loop.
Thanks in advance...
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