How to smooth 3D surface plot

[btayhan]

I have a 3D surface plot like this:

I am not sure how to smooth this plot, I searched but could not find any information.

[empet]

If you know the surface height, z, at n scattered points of coordinates (x, y), then you can get the surface height at the points of a regular meshgrid, using griddata, method="cubic", from scipy.interpolate: https://docs.scipy.org/doc/scipy/tutorial/interpolate/ND_unstructured.html