[Paraview] Gradient between cell data

[Christoph Grüninger]

Dear ParaView!

I have a simulation computed with a finite volume method which outputs
pressure as cell data. The pressure gradient is related to the velocity
(Darcy's law). Is it possible to calculate the gradient as a finite
difference between the cell centers of adjacent cells?
The result would be located between the cells, not sure whether this
works at all.

Converting cell data to point data and using the gradient filter is not
what I want.

Bye
Christoph