[R] Stacking matrices

Chuck Cleland ccleland at optonline.net
Mon Mar 15 18:48:02 CET 2010


On 3/15/2010 1:37 PM, JLucke at ria.buffalo.edu wrote:
> What is an easy way to stack a matrix multiple times?  E.g.  I have a 6x6 
> matrix that I need to stack vertically 154 times to get a 6*154 by 6 
> matrix.  I would rather not rbind(X,X,...,X) matrices.    --Joe

X <- matrix(runif(36), ncol=6)

matrix(rep(t(X), 154), ncol=6, byrow=TRUE)

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Chuck Cleland, Ph.D.
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