Hello, I want to create a “Global variable” in Paraview (I hope that’s the correct term for my case), called beta which is given by: beta = 5*cos(6*t_value) I can use Python Filter to create it, however, the result is a scalar field over the entire domain and from properties, the Array associati…

the Array association , can be only specified as: Point Data or Cell Data They can be specified as FieldData the same way. https://vtk.org/doc/nightly/html/classvtkDataObject.html#ae20049ae4de96b695ffbbfe80f21ff68 You can just use that in your programmable filter.

Sorry, this is confusing? I am not programming, I am just using Paraview. Could you please give me some context? Because I feel lost. Thank you

You mention using Python and trying with PointData and CellData. How did you try that ? can you share what you did ?

I am using Python Calculator [image]

This is called a Python Calculator. Sadly the python calculator cannot compute a “global” FieldData. In order to do that, you can : Use the AddFieldArrays filter, but you need to have a file containing a field data to provide, not very practical Use a Python Programmable Filter, which would requ…

I have a follow up question though, where does “t_value” come from ?

Thank you for the details I have a follow up question though, where does “ t_value ” come from ? I think Paraview provides a set of available variable when using Python annotation or Python Calculator. In my case, I have a transient simulation, so t_value is the variable that stores the current …

Indeed ! Well my previous post stands then.

But, In Python Programmer filter documentation I cannot find anything related to fieldData. So is true to conclude: It is not possible to create a field data from within Paraview using Python scripting?

It is, using Python ProgrammableFilter. pdi = self.GetInput() pdo = self.GetOutput() data = vtk.vtkDoubleArray() data.SetName("MyFielData") data.InsertNextValue(13.37) pdo.GetFieldData().AddArray(data)

ParaView

How to create a global variable?

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