[R] composed matrices

[Chuck Cleland]

Eva Ubl wrote:
> I have just started programming in R and so my question might be basic but
> I cant find it in the manual
> I have four matrices A,B,C and D and want them to compose in a big matrix X
> with A in the upper left corner, B in the right upper corner, c below A
> and D below B.

A <- matrix(1:4, ncol=2)
B <- matrix(5:8, ncol=2)
C <- matrix(9:12, ncol=2)
D <- matrix(13:16, ncol=2)

rbind(cbind(A,B), cbind(C,D))
     [,1] [,2] [,3] [,4]
[1,]    1    3    5    7
[2,]    2    4    6    8
[3,]    9   11   13   15
[4,]   10   12   14   16

?rbind
?cbind

> Thanks for your help
> eva
> 
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-- 
Chuck Cleland, Ph.D.
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