RadioButtons:

--------------------------------------------------------------------------
   Create radio buttons. Units are pixels. format is a cell array of the
   form

   {'property1', value, 'property2', value, ... }

   To initialize type:

   RadioButtons( 'initialize', {'a', 'b', 'c'}, hFig )
    
--------------------------------------------------------------------------
   Form:
   tag = RadioButtons( 'initialize', s, hFig, position, rows, format, cB )
     x = RadioButtons( 'value',  tag )
     x = RadioButtons( 'string', tag )
     x = RadioButtons( 'show', tag )
     x = RadioButtons( 'hide', tag )
--------------------------------------------------------------------------

   ------
   Inputs
   ------
   action      (1,:)  Action 'initialize', 'update'
   modifier    (1,:)  Modifier to the action
   hFig        (1,1)  Handle to the figure or if 'update' radio button handles
   s           {}     Cell array of strings
   position    (1,4)  [left bottom width height]
   rows        (1,1)  Number of rows
   format      {:}    Cell array of properties
   cB          (1,:)  Callback
   
   -------
   Outputs
   -------
   x           (1,1)  Output     

--------------------------------------------------------------------------