Saving data as .csv files

MFiX
14

Jack -

You are calling vtk_to_numpy on the wrong object. You need to call GetCellData, not GetCells.

Try this:

import vtk
reader = vtk.vtkXMLUnstructuredGridReader()
reader.SetFileName("BACKGROUND_IC_0005.vtu")
reader.Update()
output = reader.GetOutput()
data = output.GetCellData()
print(data.GetNumberOfArrays())
arr = data.GetArray(0)
print(arr)
print(arr.GetTuple(0))
print(vtk_to_numpy(arr))

these values are just the x-velocity components that you’re writing in the VTK file. If you had selected more variables the tuples would contain multiple values. CORRECTION: each variable is stored in its own array.

– Charles

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