[R] simple matrix question

[Christoph Lehmann]

what is the easiest way to get from 
> x
     x1 x2
[1,]  2  3
[2,]  3  2
[3,]  1  3
[4,]  1  4

the matrix xbar

> xbar1
       x1 x2
[1,] 1.75  3
[2,] 1.75  3
[3,] 1.75  3
[4,] 1.75  3

with the mean of the columns of x as values?

thanks

christoph

-- 
Christoph Lehmann <lehmann at puk.unibe.ch>
University Hospital of Clinical Psychiatry