while on the subject of excellent free programs try Graph 4.3 at
_http://www.padowan.dk/graph/_ (http://www.padowan.dk/graph/)
It ill draw flexible graphs of a written function of a table of numbers.
Take derivatives, integrate, and least squares fit anything
Alex. F. Burr
In a message dated 5/20/2011 4:21:29 P.M. Mountain Daylight Time,
treborsci@verizon.net writes: