Hi, Any hints on how I would generate the means of each 5 number group in a column of numbers in data.frame form. i.e. get mean of first five in column and then mean of second five in column etc. etc. 1 3.4 2 6.0 3 2.5 4 7.5 5 1.8 6 4.2 7 6.4 8 5.7 9 17.2 10 13.5 Grateful for any suggestions Jeremy