Hi Peng,
Try

rbind(x,y)
cbind(x,y)

HTH,
Jorge

On Fri, Sep 4, 2009 at 6:26 PM, Peng Yu <pengyu.ut@gmail.com> wrote:

> Hi,
>
> Suppose I have the following two matrices.
> > x=matrix(1:4,nr=2)
> > y=matrix(5:8,nr=2)
>
> I want to join the two matrices to get the following two new matrices.
> I did a search but I don't find any relevant webpage. Can somebody let
> me know how to do it?
>
>     [,1] [,2]
> [1,]    1    3
> [2,]    2    4
> [3,]    5    7
> [4,]    6    8
>
>     [,1] [,2] [,3] [,4]
> [1,]    1    3    5    7
> [2,]    2    4    6    8
>
> Regards,
> Peng
>
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