sort.col function

[<Agin.Patrick@hydro.qc.ca>]

Hello all,
I want to sort a matrix of numbers based on two columns and I just found
on the S-news archive the function sort.col() that does exactly what I
want to do. Just wondering one thing: how come it does not appear in the
help topics of the S-Plus language reference? (I have only sort and
sort.list). I'm using S-Plus 4.5 under Windows. Am I missing something?
Regards,
Patrick