Dear Meep users and Steven:
      I am wondering if anyone has this experience so I bring it up this topic 
again

   
 I'd like to produce different resolutions  in different directions in 
cylindrical coordination with the certain azimuthal number through 
coordination stretching.

    I read through "Coordinate 
Transformation & Invariance in Electromagnetism" but the result from
 stretching coordination is not consistent with that without stretching 
coordination.

   For example, original resolution is 0.1 \epsilon=12.5.
  Now I'd like to have the resolution along r as 0.05 and along z as 0.1, 
respectively, then new \epsilon I used is
    epsilon-diag ( (\ 12.5 2) (\ 12.5 2) 12.5) (the resolution is still 0.1)
  But the output field is black.

 If I tried    epsilon-diag ( (* 12.5 2) (* 12.5 2) 12.5)
  The output field
 is not consistent with the original one.
  Maybe I misunderstood that paper but I wonder if anyone has this experience 
to share with.

  Thank you very much

Adrian




      
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