TrnsZero:

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   Computes the transmission zeros of a plant

   For continuous time systems.

   Since version 1.
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   Form: z = TrnsZero( a, b, c, d )
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   ------
   Inputs
   ------
   a                   Plant matrix
   b                   Input matrix
   c                   Measurement matrix
   d                   Input feedthrough matrix

   -------
   Outputs
   -------
   z                   Transmission zeros

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   References:   Maciejowski, J.M., Multivariable Feedback Design, 
                 Addison-Wesley, 1989, pp. 386-389.
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Children:

Common: Control/SizeABCD
Math: Linear/ColCompR
Math: Linear/IsZero
Math: Linear/RowCompU