R help - Jan 2003 - lists to arrays

Does anyone know how to coerce a list to an array? I have a list with
equal sized matrixes and I want to coerce it to a 3D array.
Why is that that I cannot feed in equal sized matrixes as layers to an
array even if I set dim 3?

Thanks!
Katalin
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Katalin Csillery
Division of Biological Sciences
University of Montana, Missoula MT 59801
Phone: 406 243 6106, E-mail: csillery at selway.umt.edu
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On Tue, Jan 21, 2003 at 05:33:57PM -0700, Katalin Csillery
wrote:
> Does anyone know how to coerce a list to an array? I have a list with
> equal sized matrixes and I want to coerce it to a 3D array.
lists are special.  you'll have to unlist() first.  As an example:

zz <- list(a=matrix(1:9,ncol=3),b=matrix(10:18,ncol=3))
aa <- array(unlist(zz),dim=c(3,3,2))

However, useful as arrays are, finding a way to do the same job with
arrays can be very helpful - they're quite flexible.

Cheers

Jason


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