help with one matrix
Gabor Grothendieck wrote:
On 9/10/05, Jose Claudio Faria <joseclaudio.faria at terra.com.br> wrote:
Dear R-list,
Could anybody tell me how to make one matrix as the below:
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] - 2 3 4 5 6
[2,] 2 - 2 3 4 5
[3,] 3 2 - 2 3 4
[4,] 4 3 2 - 2 3
[5,] 5 4 3 2 - 2
[6,] 6 5 4 3 2 -
Assuming that - means NA dd <- diag(NA, 6) abs(col(dd) - row(dd)) + 1 + dd or abs(outer(1:6, 1:6, "-")) + 1 + diag(NA,6) or f <- function(x,y) ifelse(x==y, NA, abs(x-y)+1) outer(1:6, 1:6, f)
Hi, You are always solving (and teaching) my R doubts: thanks Gabor, very much! Because I need one, I've been trying to make a more flexible function for multiple comparison test of means (Tukey, SNK and Duncan). The matrix above is necessary for SNK and Duncan tests. So, when running I will to sent it for you for suggestions. Best,
Jose Claudio Faria Brasil/Bahia/UESC/DCET Estatistica Experimental/Prof. Adjunto mails: joseclaudio.faria at terra.com.br jc_faria at uesc.br jc_faria at uol.com.br tel: 73-3634.2779