I want to fit experimental data and I was wondering if there is a special PolynomialFit function for a surface.
My data consist of a X,Y, Matrix of densities and I want to have a function describing the surface of the values. On matlab the following code will do so:
[x, y, z] = prepareSurfaceData(temps, concs, densities);
ft = fittype('poly33');
fitresult = fit([x, y], z, ft);
Maybe that gives you a better view of what I want.