![How to vectorize computations in a matrix language](https://blogs.sas.com/content/iml/files/2013/05/t_vectorizecomputations.png)
Last week someone posted an interesting question to the SAS/IML Support Community. The problem involved four nested DO loops and took hours to run. By transforming several nested DO loops into an equivalent matrix operation, I was able to reduce the run time to about one second. The process of