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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Have you tried vtkDataArray::GetRange()?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><a href="https://www.vtk.org/doc/nightly/html/classvtkDataArray.html#a717568beffb50a7ddff9ed3919dcf153">https://www.vtk.org/doc/nightly/html/classvtkDataArray.html#a717568beffb50a7ddff9ed3919dcf153</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Computing range may take a long time on large data sets. GetRange() has an important feature that it caches the computed range and the value is also propagated
through the processing pipeline.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Andras<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> vtkusers [mailto:vtkusers-bounces@vtk.org]
<b>On Behalf Of </b>Cory Quammen<br>
<b>Sent:</b> Monday, December 18, 2017 10:11 AM<br>
<b>To:</b> scotsman60 <doug@beachmailing.com><br>
<b>Cc:</b> vtkusers <vtkusers@vtk.org><br>
<b>Subject:</b> Re: [vtkusers] How to find range of data in Cell Scalar Array?<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm not sure if there is something in VTK that does this, but the good news is you can use numpy to do it. See Berk's blog post series on VTK/numpy integration starting with <a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fblog.kitware.com%2Fimproved-vtk-numpy-integration%2F&data=02%7C01%7Classo%40queensu.ca%7C9e44ae347d034dd9a79708d546298e0b%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636492066658759271&sdata=bo1AD39UpsmbDQrtzVsAswaqwGloD33ChgklbtqwJAQ%3D&reserved=0">https://blog.kitware.com/improved-vtk-numpy-integration/</a>.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">HTH,<o:p></o:p></p>
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<p class="MsoNormal">Cory<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Sun, Dec 17, 2017 at 8:32 PM, scotsman60 <<a href="mailto:doug@beachmailing.com" target="_blank">doug@beachmailing.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hello,<br>
<br>
I'm using vtk in a Python app and I need to set parameters on a lookup table<br>
based on the range of values in an integer scalar array associated to Cells<br>
in a vtkUnstructuredGrid.<br>
<br>
I can access the array ,<br>
<br>
name = self.mesh.GetCellData().GetArrayName('PID')<br>
<br>
where self.mesh is my vtkUnstructuredGrid<br>
<br>
But how can I find the unique value sin this array?<br>
<br>
I need something like numpy.unique () - is there a vtk method available?<br>
<br>
Thanks in advance,<br>
<br>
<br>
Doug<br>
<br>
<br>
<br>
--<br>
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<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">Cory Quammen<br>
Staff R&D Engineer<br>
Kitware, Inc.<o:p></o:p></p>
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