milbouma@eplrx7.uucp (Mark Milbourne SCD) (12/31/90)
I'm looking for software for a researcher here that will do 3-dimensional curve (surface) fitting on grids of data where z = f(x,y). At the very least it should do linear, log, exp, and polynomial fits. Basically we need to give it a grid of data and get a z = f(x,y) function that reasonably describes the surface. Fitting user defined functions like KaleidaGraph does for 2 dimensions would be a major plus. Handling 4 or 5 dimensions would be even nicer but not as necessary. I have experiemented with using KaleidaGraph to fit slices of z vs. x, holding y constant, to get sets of coefficients and then fitting to y vs. each set of coefficients. This gives a final equation after massive substitution. The results form that are reasonable but it is a tedious process even for a few slices with just a couple coefficients. Does Mathematica even do this? Please e-mail and I'll summarize to the net. Thanks and Happy New Year! Mark Milbourne Reply to address in header above or to milbouma%esvax@dupont.com. -- The UUCP Mailer