1c_nnpntinits(3NCARG)             NCAR GRAPHICS            c_nnpntinits(3NCARG)
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NAME

6       c_nnpntinits - Enter single point mode
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FUNCTION PROTOTYPE

9       void c_nnpntinits(int, float [], float [], float []);
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SYNOPSIS

12       void c_nnpntinits (npnts, x, y, z);
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DESCRIPTION

15       npnts       The number of input data points. (npnts > 2)
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17       x           An array of size npnts containing the X coordinates of the
18                   input data points.
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20       y           An array of size npnts containing the Y coordinates of the
21                   input data points.
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23       z           An array of size npnts containing the functional values of
24                   the input data points. That is, z[n] is the value of the
25                   input function at coordinate (x[n],y[n]), for 0 <= n <
26                   npnts.
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USAGE

29       This function is invoked when you want to interpolate at individal
30       points.  It is an initialization routine that sets up some internal
31       variables and does this initial triangulation. To actually do the
32       interplation, use function c_nnpnts.  To terminate single point mode,
33       use the function c_nnpntend.
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ACCESS

36       To use c_nnpntinits, load the NCAR Graphics library ngmath.
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SEE ALSO

39       natgrid, natgrid_params, c_natgrids, c_nnpnts, c_nnpntend.
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41       Complete documentation for Natgrid is available at URL
42       http://ngwww.ucar.edu/ngdoc/ng/ngmath/natgrid/nnhome.html
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45       Copyright (C) 2000
46       University Corporation for Atmospheric Research
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48       The use of this Software is governed by a License Agreement.
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52UNIX                            March 1997-1998           c_nnpntinits(3NCARG)
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