Hello, I'm new to the list so I thought I'd introduce myself. I use Numpy at work for some Python programs that interface with Agilent and/or Anritsu microwave equipment, using the GPIB bus. However, my main interest lately is porting some EM codes into Numeric Python. I've had varied success. See my web site www.members.home.net/europax. Right now I'm trying to Numpy-ize this FEM-MOM code. I've profiled it using the Python profile class. Using MOM for a dipole takes 5 minutes of cpu :) :) Interestingly, some of the worst routines are simple ones that really have little to do with matrix math. Anyway, I'm having fun. Its wonderful to be able to focus on algorithms rather than wading through arcane programming syntax !! Rob.