NNPNTINITS - Enter single point mode

       To use NNPNTINITS, load the NCAR Graphics library ngmath.

       Copyright (C) 2000
       University Corporation for Atmospheric Research

       The use of this Software is governed by a License Agreement.

UNIX                                             March 1997-1998                              NNPNTINITS(3NCARG)

       NPNTS       (Integer, Input) - The number of input data points. (NPNTS > 3).

       X           (Real,  Input)  -  An array of dimension NPNTS containing the X coordinates of the input data
                   points.

       Y           (Real, Input) - An array of dimension NPNTS containing the Y coordinates of  the  input  data
                   points.

       Z           (Real,  Input)  -  An  array of dimension NPNTS containing the functional values of the input
                   data points. That is, Z(L) is the value of the input function at coordinate (X(L),Y(L)),  for
                   L=1,NPNTS.

       NNPNTINITS - Enter single point mode

       natgrid, natgrid_params, natgrids, nnpnts, nnpntend.

       Complete documentation for Natgrid is available at URL
       http://ngwww.ucar.edu/ngdoc/ng/ngmath/natgrid/nnhome.html

       CALL NNPNTINITS (NPNTS, X, Y, Z)

       This  subroutine  is  called  when  you want to interpolate at individal points.  It is an initialization
       routine that sets up some internal variables and does this initial triangulation.   To  actually  do  the
       interplation, use subroutine NNPNTS.  To terminate single point mode, use the subroutine NNPNTEND.