[Paraview] Merging very close Points

[kenichiro yoshimi]

Hi all,

I want to merge the very close (or coincident) points in PV. For instance,
there are very close two points and one point apart from them, i.e., an
ASCII VTK File:
----------
vtk output
ASCII
DATASET UNSTRUCTURED_GRID
POINTS 3 float
1 1 1
0 0 0
0 0 1e-014
CELLS 3 6
1 0
1 1
1 2
CELL_TYPES 3
1
1
1
----------
I use the Clean to Grid filter to merge the two close points, but after
that there remains three points.  Can anyone tell me what this is?

Thanks,
yoshimi
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