On 2011-04-21 07:03, Marten Winter wrote:
Heja,
I hope someone is still there to help me:
How can I somehow merge/combine matrices to get such a result:
Matrix A
A B
x1 1 0
x2 1 1
Matrix B
C D
x3 1 0
x4 0 1
Resulting Matrix?
A B C D
x1 1 0 0 0
x2 1 1 0 0
x3 0 0 1 0
x4 0 0 0 1
If you don't need this very often or very general, then use
mat <- diag(0,4)
mat[1:2, 1:2] <- A
mat[3:4, 3:4] <- B
mat
If you do need more flexibility, you could use the 'assist'
package's function bdiag() which handles block-diagonal
matrices:
require(assist)
mat <- bdiag(list(A,B))
Peter Ehlers
Does anyone see this probably obvious solution with R how to do this?
Sorry if this question is silly...it's too hot here to think properly ;O)
Thanks!
cheers
Marten
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