SUBROUTINE pickindex(arr, iindex, aorder)

*
*  This software was developed by the Thermal Modeling and Analysis
*  Project(TMAP) of the National Oceanographic and Atmospheric
*  Administration's (NOAA) Pacific Marine Environmental Lab(PMEL),
*  hereafter referred to as NOAA/PMEL/TMAP.
*
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*
C  Ansley Manke 1/99

*  Called by external functions samplei, samplej, samplek, samplel.
*  Get the index to sample, whichever axis of arg_1 it is on.  Collapse
*  array arr to one dimension and return the i'th point.

      real arr(*), aorder
      integer iindex

      aorder = arr(iindex)

      return
      end