![More on the SWEEP operator for least-square regression models](https://blogs.sas.com/content/iml/files/2020/12/ProjRSq1-702x336.png)
One of the benefits of using the SWEEP operator is that it enables you to "sweep in" columns (add effects to a model) in any order. This article shows that if you use the SWEEP operator, you can compute a SSCP matrix and use it repeatedly to estimate any linear