[R] Stacking matrices

[Chuck Cleland]

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)

> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code. 

-- 
Chuck Cleland, Ph.D.
NDRI, Inc. (www.ndri.org)
71 West 23rd Street, 8th floor
New York, NY 10010
tel: (212) 845-4495 (Tu, Th)
tel: (732) 512-0171 (M, W, F)
fax: (917) 438-0894