[Paraview] Down sample data?

[John Haase]

Hello all,

I'm trying to down select my data so I can do a grid convergence study. How
would I go about doing this?

I found an old post (
https://public.kitware.com/pipermail/paraview/2010-November/019453.html)
that recomended doing an "extract subset" filter; however that filter is
grayed out.

Any advice would be appreciated

Regards,

John
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