![Access rows or columns of a matrix by names](https://blogs.sas.com/content/iml/files/2012/09/mattrib1.png)
Did you know that you can index into SAS/IML matrices by using unique strings that you assign via the MATTRIB statement? The MATTRIB statement associates various attributes to a matrix. Usually, these attributes are only used for printing, but you can also use the ROWNAME= and COLNAME= attributes to subset