In looking for the graphing code (see previous message),
I came across a directory I had of a large body of statistical
computing code. This code, written by experts, is a competitor to "S"
and was written in lisp, a number of years ago. In fact, a whole
lisp system was built on it: Lisp-stat. It lost out in competition
to "S", for reasons that have to do more with market pressure rather
than technical prowess. (there is a history on this..)
anyway
http://github.com/blindglobe/common-lisp-stat
is a common lisp port of the system.
I have an older version from Luke Tierney, which includes explicit
ports with pieces of C code to optimize KCL (now GCL), as well as
a number of other lisps. I have not looked at the github code.
But numerical statistical computing in lisp is available, and
perhaps sufficiently portable as to become useful to people.
(if you take this up seriously, you should also consider whether
linking to "S" is feasible or even preferable.)
RJF