Hi Dick, I tried your solution assuming that plines is my original data in fld mydata as described.
I get a resulting output incredibly fast but the column 1 values don't work... ie I think they are putting the line number associated with the group size and not the original column data? In other words the two values found in column 2 of the group data must then get the corresponding column1 values from the original dataset. For example a basic dataset where column 1 is linear from 1 to 50,000 the solution should produce only values once from column 1... ie from the first group of 50 the column 1 values should be two numbers between 1 to 50. The next group will produce a max and min with their associated values between 51 to 100. 1 13 2 12 3 12 4 13 5 14 6 16 7 14 8 12 9 13 10 12 ===== 2 12 6 16 ===== 11 10 12 3 13 10 14 11 15 12 16 11 17 13 18 17 19 15 20 16 ===== 12 3 17 17 ===== current solution 2 12 6 16 12 3 17 17 All column 1 values will be unique. Unless I am wrong on what plines is? Glen _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode