[x,y,z]=meshgrid(linspace(-1.3,1.3));val=(x.^2 + (9/4)*y.^2 + z.^2 - 1).^3 - x.^2.*z.^3 - (9/80)*y.^2.*z.^3;isosurface(x,y,z,val,0)axis equalview(-10,24)colormap([1 0 0])
