Hi, I want to fit a surface through data points that I got from a simulation. I calculated a curvature (k) for several combinations of wavelengths (l) and numerical apertures (NA). I know the relation between the curvature and wavelength for constant NA, also between curvature and NA for constant wavelength. The one dimensional fit functions are:
k = a1*NA^(-2) (for one wavelength)
k = b1*l^4 + b2*l^3 + b3*l^2 + b4*l (for one NA)
Now I want to use the Curve Fitting Tool with a custom equation to fit a surface through my data points. Probably a simple question but how can I combine my two fit functions into one function describig the surface? Just combining them like
z=f(x,y)=a1*NA^(-2) + b1*l^4 + b2*l^3 + b3*l^2 + b4*l
didn't work as planned. Thanks!
