[Paraview] Sum of a vector variable over time in paraview

[Jay Romero]

Hi

I want achieve this simple step in paraview:

I am trying to calculate the temporal sum of a vector variable ( for
example: velocity vector) as:

Sum ( I V_k |  dt_k )

where | V_k | : magnitude of velocity vector
          dt_k: time step
           k: time step number

I am wondering how to achieve it in paraview.  Is it possible to do in
Python calculator or Python Shell.

Best Regards

Jay
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