sketch cone in matlab

Sketch in MATLAB the 3D surface of the cone (z −1)^2 = x^2 + y^2

Answer 1

[KSSV]

t = linspace(0,2*pi,50) ;
r = linspace(0,3,50) ;
[th r] = meshgrid(t,r) ;
x = r.*cos(th) ;
y = r.*sin(th) ;
z = r ;
surf(x,y,z) ;