DBode:

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   Generates a Bode plot for a discrete time system.

   Generates a Bode plot for a discrete time system from iu to iy.

   x(k+1) = ax(k) + bu(k)
     y(k) = cx(k) + du(k)

   Since version 2.
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   Form:
   DBode( a, b, c, d, iy, iu, w, dT )
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   ------
   Inputs
   ------
   a				      State transition matrix
   b				      Input matrix
   c				      Measurement matrix
   d				      Input feedthrough matrix
   iy                    Output channel
   iu                    Input channel
   w                     Plot frequency vector (rad/sec)
   dT                    Time step         

   -------
   Outputs
   -------
   none	 

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Children:

Common: Control/SS2ND
Common: Control/ZFresp
Common: Graphics/NewFig
Common: Graphics/XLabelS
Common: Graphics/YLabelS