OK, the hint by Dimitris applied I just do very simple:
test <- array(c(1:16), dim = c(3,4,3)) test ## I call some enries using an index array test.ind <- array(rbind(c(1,2,1), c(3,3,2)), dim = c(2,3)) test[test.ind]
## suppose I want all values in the 2nd row and 4th col over ## all three 3rd dimensions test[2,4,]
## using an index array
nn <- dim(test)[3]
voxel.ind <- c(2, 4)
test.ind <- array(cbind(rep(voxel.ind[1], nn), rep(voxel.ind[2], nn), 1:nn), dim = c(nn, 3))
test[test.ind]
cheers christoph Christoph Lehmann wrote:
Hi I have the following array:
test <- array(c(1:16), dim = c(3,4,3)) test ## I call some enries using an index array test.ind <- array(rbind(c(1,2,1), c(3,3,2)), dim = c(2,3)) test[test.ind]
## suppose I want all values in the 2nd row and 4th col over ## all three 3rd dimensions test[2,4,]
how to specify a test.ind array with the last index left with ',' i.e test.ind should be evaluated as "2, 4, , " so that it can be calledlike above as test[test.ind] and the result should be [1] 11 7 3
thanks for a hint Cheers christoph
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