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Markus Steffan wrote: > > Hello, > > I found your email-address in the newsgroup comp.soft-sys.math.mathematica > and I would like to know if/how I can do multi-dimensional non-linear > Gauss regression (least squares) with mathematica (or if this is not possible > with another program). I hope you can help me with this. > > Regards > > Markus Steffan. > > ---------------- > > email: msteffan at mi.uni-koeln.de #1: Mathematica is a high level programming language. It can do anything that can be done in Fortran or C as far as number crunching goes. So the answer to any question like "Can I do .... with mathematica?" is yes. As far as it being possible with mathematica or another program: be courageous! You don't need to look all over the world for some canned routine to solve a problem for you. Learn a programming language (or several) and write your own! #2: It turns out that a pre-written routine is available in Mathematica for what you want. The command Fit uses least squares fitting and will take multidimensional basis functions. I have done fits with Sqrt[x^2 +y^2]and Exp[-x^2-y^2] to various powers.