COMPUTE LOCATION

        [SIC\]COMPUTE OutVar LOCATION InVar Value

    Search for Value in the array InVar, and puts in OutVar  the  2  nearest
    indices  of  InVar for which its values surrounds Value. These variables
    have some requirements:
      - InVar  must be a 1D-array of REAL or DOUBLE values,
      - Value  must be scalar numeric,
      - OutVar must be a 1D-array of 2 INTEGER values.
    InVar is also intended to be ordered (ascending or descending), or  else
    the result is unpredictable. Use SIC\SORT to sort arrays.