Hi, How the data bellow was obtained? What object is tN? > tN 1 2 3 4 5 6 7 8 10 11 12 6 13 10 16 19 12 11 8 2 2 1 str(tN) 'table' int [, 1:11] 6 13 10 16 19 12 11 8 2 2 ... - attr(*, "dimnames")=List of 1 ..$ : chr [1:11] "1" "2" "3" "4" ... I'd like to do the same with another data. Thanks, Paulo