Hello everybody.
I am trying to reproduce a particular matrix in an elegant way. If I
have
jj1 <-
structure(c(1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,
3,1,2,3,1,2,3,1,2,3,2,3,1,2,3,1,2,3,1,2,3,
1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,3,1,2,3,1,
2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,
2),.Dim = as.integer(c(9,9)))
[ image(jj1) is good here ] then I can get this with
kronecker(matrix(1,3,1),kronecker(1+outer(0:2,0:2,"+")%%3,matrix(1,1,3)))
I want to reproduce the following matrices in an equivalent way:
jj2 <- matrix(c(1,2,3,1,2,3,1,2,3,2,3,1,2,3,1,2,3,1,
1,2,3,1,2,3,1,2,3,3,1,2,3,1,2,3,1,2,1,2,3,1,2,
3,1,2,3,3,1,2,3,1,2,3,1,2,2,3,1,2,3,1,2,3,1,3,
1,2,3,1,2,3,1,2,2,3,1,2,3,1,2,3,1),9,9)
jj3 <- structure(c(1,2,3,2,3,1,3,1,2,1,2,1,2,3,2,3,1,
3,1,3,1,2,1,2,3,2,3,2,3,1,3,1,2,1,2,3,2,3,
2,3,1,3,1,2,1,2,1,2,3,2,3,1,3,1,3,1,2,1,2,
3,2,3,1,3,1,3,1,2,1,2,3,2,3,2,3,1,3,1,2,1, 2),.Dim =
as.integer(c(9,9)))
[ note that jj1-jj3 each have precisely 3 occurrences of A, B, and C
along each row, column and (broken) diagonal ].
Can anyone give me a nice elegant way of creating jj2 and jj3 please?
--
Robin Hankin
Uncertainty Analyst
Southampton Oceanography Centre
SO14 3ZH
tel +44(0)23-8059-7743
[EMAIL PROTECTED] (edit in obvious way; spam precaution)
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