Draw 1 hyperboloid with equation -0.2x^2 - 0.2y^2 +z^2 =1 with colormap jet

I want to make it very succinct, but it doesn't seem to work

Answer 1

[Davide Masiello]

[x,y] = meshgrid(linspace(-10,10,100));
z     = sqrt(1+0.2*x.^2+0.2*y.^2);

Then you can plot it in many ways. Examples

figure(1)
contourf(x,y,z)
colormap(jet)
colorbar
axis equal

figure(2)
surf(x,y,z)
colormap(jet)
colorbar

figure(3)
surf(x,y,z,'EdgeColor','none'), hold on
surf(x,y,-z,'EdgeColor','none')
colormap(jet)
colorbar
axis equal