Hi Rick, I took your Simulation continuing education course at JSM 2012. I am trying out the code, containing "call tabulate". I have SAS 9.2 and as I am learning, "call tabulate" does not work in that version. Can you expound more in using this Unique-Loc trick as an alternative. The example you outlined in this blog is if you have a data with character and numeric variables. How about in your JSM course example when you only have a single column of coin toss outcome (page 45 of your slides). Thanks in advance.