Thanks dcrich... that looks like what I needed to clear up the uncertainties. For some reason, I was having a hard time visualizing the application of the steps when looking at the Mat lab interface. Reading that made me want to go Doh! That's what he meant! Cool.

"I am a good person now and it feels... well, pretty much the same as I felt before (except that the headaches have gone away now that I'm not wearing control top pantyhose on my head anymore)"

• Monkeysmell