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    Interpolation algorithm
 
    By default, <a href="interplatlon.html">INTERPLATLON</a> uses Matlab's INTERP2 with linear 
    interpolation.  Alternatively, <a href="interplatlon.html">INTERPLATLON</a>(...,METHOD) uses the method
    specified by the string METHOD, as described in INTERP2.
  
    Data points for which the chosen interpolation method does not return a
    valid value are then filled using nearest-neighbor interpolation.
 
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