Thanks for the input. :)

I have used R in the past, but it was part of a spatial statistics course which many of us in the class wanted to forget about (don't ask, the professor was nice, but didn't know how to teach), but I will download the binary. Actually what I am doing is signal processing and modeling of ground-penetrating radar data as well as estimation/ modeling of dielectric properties and so on. I'll definitely check Octave out now that I installed the full complement of Cygwin on my machine.

Thanks,
Dr. Guy