I am not sure if this is appropriate here, my apologies if not. I have used R for 20 years now and need help with non-linear regression analysis over 100's of different frequencies and my data has exceeded by R program capabilities. My company would provide the contract. keith M. Keith Cox, Ph.D. Principal MKConsulting 17415 Christine Ave. Juneau, AK 99801 U.S. 907.957.4606 [[alternative HTML version deleted]]