LL to UTM

Gabor Grothendieck wrote:

I am currently using this web page to convert LL to UTM (and UTM to LL).

   http://home.hiwaay.net/~taylorc/toolbox/geography/geoutm.html

All my points are in zone 18.  How would I accomplish the same
thing using R?

Thanks.

Within GRASS there is an Addon: utm_which_zone.sh

http://grass.gdf-hannover.de/wiki/GRASS_AddOns/

which it seems to accomplish this task even from a shell, just using awk
(I have attached the file)