At 1:06 PM -0300 2/24/10, Kjetil Halvorsen wrote:
see below.
On Wed, Feb 24, 2010 at 12:56 PM, Gustave Lefou <gustave5...@gmail.com> wrote:
Dear all,
I do not know how to deal with block matrices in R.
For example I have 3 matrices A, B and C.
And I want to produce a new matrix of this form
( A B 0 )
( 0 0 C )
where A, B and C are one-row matrices.
cbind(A,B,0) or maybe
cbind(a,B,rep(0, 12))
cbind(rep(0,2), C)
For the case where you have A and B matrices
library(psych)
C <- super.matrix(A,B) will produce
A 0
0 B
e.g.
A <- matrix(1:4,2,2)
B <- matrix(5:16,3,4)
C <- super.matrix(A,B)
C
X1 X2 Y1 Y2 Y3 Y4
Vx1 1 3 0 0 0 0
Vx2 2 4 0 0 0 0
Vy1 0 0 5 8 11 14
Vy2 0 0 6 9 12 15
Vy3 0 0 7 10 13 16
Bill
Apart from A, B and C, all the coefficients are 0.
Is there an easy solution in R for every block matrices ?
Combine rbind and cbind:
?rbind
Kjetil
Thanks for your help,
Gustave
P.S. : I have had a look at a function called "zoo" which looked quite
complicated to me.
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