[Paraview] comparison of two dataset (same mesh ) but not in the same order

[Moreland, Kenneth]

I would go so far as to say that there probably is no easy way to find consistent ordering of topology. In fact, I suspect that this is an NP-hard problem. (General graph isomorphism certainly is.) 

I would first pursue other resampling methods. You could apply the cell centers filter to the grid with cell data. That gives you a cloud of points at the center of each cell. The distinction between cell and point data is now in name only. Then, resample the point data grid with the cell centers. That will give you the point data interpolated to the cell centers.

-Ken

Sent from my iPad so blame autocorrect.

On May 29, 2012, at 4:54 AM, "Utkarsh Ayachit" <utkarsh.ayachit at kitware.com> wrote:

> I don't think such a filter exists in ParaView. You'll have to write a
> custom filter or a Python programmable filter to convert one of the
> datasets to the same point/cell order as the other.
> 
> Utkarsh
> On Tue, May 29, 2012 at 5:15 AM, Felipe Bordeu
> <felipe.bordeu at ec-nantes.fr> wrote:
>> Hi,
>> 
>> One of my student is validating his code, and we want to compare the results
>> (point data, cell data).
>> We have two result: one from a commercial code, and the other from our code.
>> 
>> The dicretisation are the same: same number of node, same number of element.
>> But the order of the node and element in the files are not the same, so we
>> cant use append attributes.
>> 
>> For for the point data we use re-sample with dataset. But the problem is
>> than the celldata is automatically converted to point data (I know there is
>> no definition of  re-sample with dataset with cells in the source).
>> 
>> So my question is "Is there an easy way of sorting the point and cells so
>> they have the same order for the two datasets so I can use append
>> attributes?"
>> 
>> A sort of "clean to grid" that also apply a unique order to the point and
>> cells.
>> 
>> Thanks,
>> 
>> --
>> 
>> Felipe Bordeu Weldt
>> Ingénieur de Recherche
>> -------------------------------------
>> Tél. : 33 (0)2 40 37 16 57
>> Fax. : 33 (0)2 40 74 74 06
>> Felipe.Bordeu at ec-nantes.fr
>> Institut GeM - UMR CNRS 6183
>> École Centrale Nantes
>> 1 Rue de La Noë, 44321 Nantes, FRANCE
>> -------------------------------------
>> 
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