A Hurricane

This is similar to the first 2-D vector field example, illustrating rotation, except we are extending it into 3 dimensions.

> hurricane:=vector([-y,x,0]);

> fieldplot3d(hurricane,x=-2..2,y=-2..2,z=0..4,axes=normal,scaling=constrained,thickness=2,arrows=SLIM,shading=zhue,orientation=[45,65]);

Note the "shading=zhue" option. This colours the plot by z-value, making it easier to distinguish which vectors belong to which z-layer.

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