[Paraview] Animating a Vector from Python

[Kent Eschenberg]

The book's example on p.314 (pi?) for animating StartTheta works for me but I need to animate a vector such as the sphere's center. I tried

   cue.AnimatedPropertyName = "Center"
   keyf0.KeyValues= [ -0.2, -0.2, -0.2 ]
   keyf1.KeyValues= [ 0.2, 0.2, 0.2 ]

but only the location in X changes. What's the secret protocol here?

TIA!
Kent
Pittsburgh Supercomputing Center