Hello All, plenty of matlab links are found at www.math.arizona.edu/~restrepo/475B/475B.html Cheers JMR ------------------------------------------------------------ Juan Mario Restrepo Rm 707 Mathematics Building Mathematics Department University of Arizona Tucson, AZ 85721 USA (520) 621-4367 office (520) 621-8322 fax URL http://www.math.arizona.edu/~restrepo/