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[Govinda Lilley <govinda.lilley@xxxxxxxxxxxx>]

Hi!
I've been trying to write some code to simulate metalic nano structures 
with python-meep. However, I could find no clue how use a complex 
permittivity in the material stack. If I use a complex array as a 
parameter for add_material_stacks_from_numpy_matrix() I get the 
following error.

Traceback (most recent call last):
  File "<pyshell#33>", line 1, in <module>
    mat=epsilon()
  File "<pyshell#32>", line 16, in __init__
    self.add_material_stacks_from_numpy_matrix(ms, 2)
  File "/usr/local/lib/python2.6/dist-packages/meep.py", line 4337, in 
add_material_stacks_from_numpy_matrix
    return 
_meep.PolygonCallback3D_add_material_stacks_from_numpy_matrix(self, *args)
TypeError: array cannot be safely cast to required type

I have tried using the NUMPY matrix metod too with the same result. I am 
not sure how to proceed from here or where to look.

Best regards,
Govinda

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