On Apr 19, 2012, at 9:14 AM, Sebastian Schubert wrote: Compare >> str( array(1,dim=c(3,4,5,1,1))[2:3,1:3,4:5,,] > str( array(1,dim=c(3,4,5,1,1))[2:3,1:3,4:5,,,drop=FALSE] ) num [1:2, 1:3, 1:2, 1, 1] 1 1 1 1 1 1 1 1 1 1 ... -- David Winsemius, MD West Hartford, CT