Covariance, correlation, and distance matrices are a few examples of symmetric matrices that are frequently encountered in statistics. When you create a symmetric matrix, you only need to specify the lower triangular portion of the matrix. The VECH and SQRVECH functions, which were introduced in SAS/IML 9.3, are two functions
Uncategorized
Creating symmetric matrices: Two useful functions with strange names
Implement BY processing for your entire SAS program
How to write a SAS macro program to repeat your SAS processing for each value of a BY grouping variable.
Top 3 tips for advanced SAS programmers
Art Carpenter’s newest book, Carpenter’s Guide to Innovative SAS Techniques, offers advanced SAS programmers an all-in-one programming reference that includes advanced topics not easily found outside the depths of SAS documentation or more advanced training classes. No matter how you approach the use of SAS software, the techniques provided in