Hi Gerrit, Thanks for your advice.
- snip - > A[i, j, k] is the value of the element in position (i,j,k) of array A. In > other words, it is the entry in row i, column j, and "layer" k (if one > wants to think of A as a cuboidal grid). Sorry I can't follow. Could you pls explain in more detail. e.g. > z <- 0:23 > dim(z) <- c(3,4,2) > dim(z) [1] 3 4 2 > z , , 1 [,1] [,2] [,3] [,4] [1,] 0 3 6 9 [2,] 1 4 7 10 [3,] 2 5 8 11 , , 2 [,1] [,2] [,3] [,4] [1,] 12 15 18 21 [2,] 13 16 19 22 [3,] 14 17 20 23 TIA B.R. Stephen L --------------------------------------------------------------------- AOR Dr. Gerrit Eichner Mathematical Institute, Room 212 gerrit.eich...@math.uni-giessen.de Justus-Liebig-University Giessen Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany Fax: +49-(0)641-99-32109 http://www.uni-giessen.de/cms/eichner --------------------------------------------------------------------- ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.