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filefoo
2003 May 26
4
spinning and flipping arrays
...put)
> foo[1,,]
[,1] [,2] [,3] [,4]
[1,] 1 2 3 4
[2,] 5 6 7 8
[3,] 9 10 11 12
> foo[2,,]
[,1] [,2] [,3] [,4]
[1,] 13 14 15 16
[2,] 17 18 19 20
[3,] 21 22 23 24
flipping foo around its last coordinate would be done via
> flipfoo <- foo[,,4:1]
> flipfoo[1,,]
[,1] [,2] [,3] [,4]
[1,] 4 3 2 1
[2,] 8 7 6 5
[3,] 12 11 10 9
> flipfoo[2,,]
[,1] [,2] [,3] [,4]
[1,] 16 15 14 13
[2,] 20 19 18 17
[3,] 24 23 22 21
(a more general method would allow specifyin...