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on 27 Oct 2021
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k = 50;
u = 0:pi/k:2*pi;
v = [-1 -0.5 0 0.5 1];
for j = 1:length(v)
for i = 1:length(u)
x(i,j) = (1+v(j)*cos(u(i)/2)/2)*cos(u(i));
y(i,j) = (1+v(j)*cos(u(i)/2)/2)*sin(u(i));
z(i,j) = v(j)*sin(u(i)/2)/2;
end
end
mesh(x,y,z)
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