Graph/Draw hyperboloid

Hi! [This is a homework problem]

", , Tips: in polar corrdinates the surface of the equation is:

The result should look like this:"

We have just used surf and meshgrid to plot a cone, but I can't seem to get this hyberbolid :(

edit: This is what we have done just before;

r=linspace(0,1,21);
theta=linspace(0,2*pi,63);
k=1;
m=1/3

[R,THETA]=meshgrid(r,theta); 
X=R.*cos(THETA);
Y=R.*sin(THETA);
Z=k.*(X.^2 + Y.^2).^m;

surf(X,Y,Z)
axis equal

Answer 1

[Matt J]

You might consider this very similar example, using cylinder(),

https://www.mathworks.com/help/matlab/ref/cylinder.html#mw_1c93092a-9ff0-48b8-902f-f91b1d564c18

[Lillebror Sagmen-Andersson]

Thanks!