On 24/02/2010 10:56 AM, Gustave Lefou 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.
The problem is that mathematical notation like that assumes a bit of
sophistication: each of those 0 matrices is potentially different. So
you might need to write a little helper function to build them, e.g.
zero <- function(rowMatrix, colMatrix) {
matrix(0, nrow = nrow(rowMatrix), ncol=ncol(colMatrix))
}
then
block <- rbind( cbind(A, B, zero(A, C)),
cbind(zero(C, A), zero(C, B), C) )
Duncan Murdoch
Apart from A, B and C, all the coefficients are 0.
Is there an easy solution in R for every block matrices ?
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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