Suppose I have data in and data out, so I do Fourier
transforms and divide them to get the transfer function numerically
and then invert back into time domain. But what I really want is given
data, get the Difference Equation, as I would if I solved the system
using Z-Transforms. I know this would be leading-edge, but given the
advanced state of symbolic computation, I don't see why this doesn't
exist yet.

- = - Vasos-Peter John Panagiotopoulos II, Columbia'81+, Bio$trategist http://ourworld.compuserve.com/homepages/vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}---

- = - Vasos-Peter John Panagiotopoulos II, Columbia'81+, Bio$trategist http://ourworld.compuserve.com/homepages/vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}---