![Testing for equality of sets](https://blogs.sas.com/content/iml/files/2012/09/t_seteq.png)
Ah! The joys of sets! It is easy to test whether two vectors are equal in SAS/IML software. It is only slightly more challenging to test whether two sets are equal. Recall that A and B are equal as sets if they contain the same elements. Order does not matter.