Your version of SAS is now almost 3 years old. There have been three releases of SAS/IML software since then. If you want the newer features, I encourage you to upgrade your version of SAS. To gain experience with SAS/IML programming, I recommend the book Statistical Programming with SAS/IML Software. I do not have a module that does sampling without replacement that works for SAS/IML 9.3. You can use the SURVEYSELECT procedure in SAS/STAT, as shown in this article: Sample without replacement in SAS - The DO Loop ... View more