[Paraview] Descriptive statistics filter

[David Thompson]

>> My second question concerns the keyword 'Cardinality' in descriptive
>> statistics.... When I make a slice of my mesh and apply the
>> statistics to it, for example, the cardinality values are far bigger
>> than the number of nodes of the sliced plane or curve. Is cardinality
>> always the total number of nodes of the grid?
>
> The reason that you see a large number of points for the cardinality
> of a slice is that slicing creates a new mesh whose nodes are not
> always nodes of the original mesh... they are intersections of mesh
> edges with the slice plane.

Slicing MAY also convert hexahedral cells into triangles before  
intersecting edges with the slice plane (I just don't recall for sure).

	David