Hello Paraviewers, I want to get the difference of all the cell data, similar to what was done here
http://paraview.markmail.org/search/?q=difference#query:difference+page:1+mid:lc6a4ss2j5hi37ps+state:results However, how do I make a writer that can accept the appended data? I tried to create the writer writer = CreateWriter(path+'Difference.e', reader[0]) writer.CellData.append( reader[0].CellData['x'] - reader[1].CellData['x'] , 'x') and got the error Traceback (most recent call last): File "<console>", line 1, in <module> File "C:\Program Files\ParaView 5.2.0-Qt4-OpenGL2-Windows-64bit\bin\lib\site-packages\paraview\servermanager.py", line 1595, in __getattr__ array = self.GetArray(name) File "C:\Program Files\ParaView 5.2.0-Qt4-OpenGL2-Windows-64bit\bin\lib\site-packages\paraview\servermanager.py", line 1531, in GetArray if not self.GetFieldData().GetArrayInformation(idx): File "C:\Program Files\ParaView 5.2.0-Qt4-OpenGL2-Windows-64bit\bin\lib\site-packages\paraview\servermanager.py", line 1520, in GetFieldData return getattr(self.Proxy.GetDataInformation(self.OutputPort), "Get%sInformation" % self.FieldData)() AttributeError: 'NoneType' object has no attribute 'GetCellDataInformation' Then, I also tried to just copy the reader writer = reader[0] writer.CellData.append( reader[0].CellData['x'] - reader[1].CellData['x'] , 'x') and got the error Traceback (most recent call last): File "<console>", line 1, in <module> File "C:\Program Files\ParaView 5.2.0-Qt4-OpenGL2-Windows-64bit\bin\lib\site-packages\paraview\servermanager.py", line 1597, in __getattr__ raise AttributeError("class has no attribute %s" % name) AttributeError: class has no attribute append Any advice? Regards, John R. Haase [email protected]
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