Surface normal in 3-D

How can I show the normal of surfaces in3-D plotting?

I use symbolic equations.

surface=str2sym(input("surface equation:","s"));

surface_EQ=symfun(surface,[x,y,z])

s=fimplicit3(surface_EQ,"FaceAlpha",0.6);

Answer 1

[Star Strider]

Although I doubt this would work with with symbolic plots without some additional coding, the surfnorm function would be worth exploring. (I have never worked with it with symbolic plots.)

Answer 2

[Chris]

I haven't tested it since it seems to need a more recent version of MATLAB, but there's a tutorial here: https://au.mathworks.com/help/symbolic/find-tangent-plane-and-normal-line.html