[Paraview] Best way to plot arrows on a subsample of data?

[Jonathan Hannay]

Hi,
I have a large amount of point data on an unstructured mesh.
 
How can I plot the vectors on a nice regular coarse sub-sample of the
underlying point data.
 
The options in the glyph filter using random and maximum points does not
give the points on a regularly shaped mesh which is what I want.
 
For example I may have a 1000x1000 square rectangle made up from an
unstructured grid with varying element sizes.
 
Now I would like to plot say just a 10x10 vector arrow plot on the surface
with uniform spacing.
 
I have tried a few things and have been unsuccessful.
 
Thanks for any help.
 
Jonathan.
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