[R] repeating rows or columns within a matrix

[Dr. Diego Kuonen]

Juhana Vartiainen wrote:
> 
> Spse I have a matrix, say
...
> and I would like to expand it by repeating rows within the matrix, to
> get, if the repeating factor is 2, say:
... 
> (or columnwise as well) . There must be a smart way of doing that?

For your particular example the following works

  apply(matrix(1:9,ncol=3,byrow=T), 2, rep, rep(2,3))

You may also want to look at 

  ?apply
  ?rep

to adapt it to your needs.

Sincerely,

  Diego Kuonen

  
-- 
Dr. ès sc. Diego Kuonen        CEO & Applied Statistician 
Statoo Consulting, PO Box 107, 1015 Lausanne, Switzerland
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