How to plot function f(x,y,z)=c ?

I am new to matlab recently, can you help me plot function cos(x) + cos(y) + cos(z) = c ?

Answer 1

[Torsten]

c = pi/2;
f = @(x,y,z) cos(x) + cos(y) + cos(z) - c

f = function_handle with value:
    @(x,y,z)cos(x)+cos(y)+cos(z)-c

fimplicit3(f,[-pi pi -pi pi -pi pi])

[Sam Chak]

👍

Answer 2

[Sam Chak]

@Duong Nguyen

Not how it looks. Are you expecting something like this?

c = pi/2;
z = @(x, y) acos(c - cos(x) + cos(y));
fsurf(z, [-pi pi -pi pi]), xlabel('x'), ylabel('y'), zlabel('z')