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my_dream_book
on 28 Oct 2021
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[r,a]=meshgrid(linspace(0,1,3),linspace(0,1*pi,99));
surf(r.*cos(a),r.*sin(a),sqrt(r).*sin(a*80),sin(a),...
'edgecolor','none','facealpha',0.9);
colormap jet;
axis equal;
box on;
view(50,5);
light;
axis off;
view([5 250]);