RelativeStatePlugin:

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   Relative State Plugin for the Formation Design GUI.

   This function is called while initializing the Formation Design GUI.

   Since version 7.
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   Form:
   d = RelativeStatePlugin( fig, pos, bColor, name );
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   Inputs
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   fig              (1)   Handle to Formation Design GUI figure
   pos             (1,2)  Position data of GUI
   bColor          (1,3)  Background color of GUI
   name            (1,3)  m-file name of GUI for callbacks

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   Outputs
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   d                (.)   Data structure of handles to "Relative State" panel controls

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