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   Compute the Magnitude of a vector of data in the PlottingTool.
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   Form:
   out = MagDPT( varargin )
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   ------
   Inputs
   ------
   varargin         (:)   Variable number of inputs, raw simulation data.

   -------
   Outputs
   -------
   out             (1,:)  Derived output data.

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