Full_Name: Frank J. Iannarilli Version: 1.9.1 OS: Win2000 Submission from: (NULL) (24.250.56.50) To the R-intro doc team: I'd like to suggest pointing out the sweep() function, probably somewhere in the section dealing with indexing. Coming from Mathematica and Matlab, I'm used to using constructs like All or :. respectively, on the l.h.s. of matrix/vector assignments to implicitly iterate ["sweep" :-)] across the rows or columns of a r.h.s. matrix. R is great, thanks! Regards,