WPZ:

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   Frequency vector with complex poles and zeros.  
  	This routine produces a frequency vector that includes all of the
   complex poles of the system and all complex zeros of each channel.
   This vector is useful for frequency response calculations.

   Since version 1.
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   Form:
   w = WPZ( a, b, c, d, n, iu, iy )
   w = WPZ( num, den, n )
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   ------
   Inputs
   ------
   a                   Plant matrix or numerator polynomials
   b                   Input matrix or denominator polynomials
   c                   Measurement matrix
   d                   Input feedthrough matrix
   n                   Number of frequency points
   iu                  Inputs  ( = 0, or leave out for all)
   iy                  Outputs ( = 0, or leave out for all)

   -------
   Outputs
   -------
   w                   Frequency vector

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Children:

Common: Control/S2Damp
Common: Control/SizeABCD
Common: Control/TrnsZero
Common: Control/WReson
Common: Graphics/LogLimit