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  Given a 2D array as input, return a copy in which there is a band
  adjacent to the edge with zero gradient normal to the edge

Positional Parameters

  data (input, 2D array)
    The input array, can be any data type

Keyword Parameters

  WIDTH (input, integer scalar)
    The width of the band in which values are changed. Default is 1.
    If WIDTH is less than 1, the result is just a copy of the input.

Return Value

  The function returns an array of the same type and dimensions as
  the input.


  Copy interior values into the band. Note that the band width is
  the same on all boundaries: given this, there is no need for
  special handling at corners.

Modification History

  Mark Hadfield, 2006-03:
    Written to replace mgh_moma_top_smoothedge and similar.

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