[ESS] ~ symbol

[Giovanni Marchetti]

This is an old problem for italian users of R.
We don't have the tilde symbol easily accessible on the italian
keyboard. This is a pity because the symbol is very important for 
statistical
models and is very annoying
to type alt126 each time. (By the way it is
something that looks very nasty to students).
Question: is there a simple method in ESS Emacs
to extend the wonderful mechanism of pressing underscore
to obtain  <- ? For instance one could press another unused key
and obtain tilde. Or even press underscore three times-

Thank you

Giovanni

-- 
Giovanni M. Marchetti           <giovanni.marchetti at ds.unifi.it>
Dipartimento di Statistica, "G. Parenti", University of Florence
viale Morgagni, 59                      Phone:  +39 055 4237 261
I 50134 Firenze, Italy                  Fax:    +39 055 4223 560