1c_dspnt2d(3NCARG)                NCAR GRAPHICS               c_dspnt2d(3NCARG)
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NAME

6       c_dspnt2d - Interpolate at a single point (or points) in 2D in single
7       precision
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FUNCTION PROTOTYPE

10       void c_dspnt2d(int, double [], double [], double [],
11                      int, double [], double [], double *, int *);
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SYNOPSIS

14       void c_dspnt2d (int n, double x[], double y[], double z[],
15                       int m, double xo[], double yo[], double zo, int *ier);
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DESCRIPTION

18       n           The number of input data points.
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20       x           An array containing the X coordinates of the input data
21                   points.
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23       y           An array containing the Y coordinates of the input data
24                   points.
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26       z           An array containing the functional values of the input data
27                   points. That is, z[l] is the value of the input function at
28                   coordinate (x[l],y[l]), for 0 <= l < n .
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30       m           The number of output data points (this may be "1").
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32       xo          An array of dimension m containing the X coordinates of the
33                   output data. The values in xo may be in any order.
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35       yo          An array of dimension m containing the Y coordinates of the
36                   output data. The values in xo may be in any order.
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38       zo          A pointer to a double. Space for m doubles is allocated for
39                   zo by dspnt2d. zo[i] is the interpolated value at point
40                   (xo[i],yo[i]) for 0 <= i < n .
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42       ier         An error return value. If *ier is returned as 0, then no
43                   errors were detected. If *ier is non-zero, then refer to
44                   the man page for dsgrid_errors.
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USAGE

47       This function is called when you want to interpolate 2D data at an
48       individual point or points.
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ACCESS

51       To use c_dspnt2d, load the NCAR Graphics library ngmath.
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SEE ALSO

54       dsgrid, dsgrid_params.
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56       Complete documentation for Dsgrid is available at URL
57       http://ngwww.ucar.edu/ngdoc/ng/ngmath/dsgrid/dshome.html
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60       Copyright (C) 2000
61       University Corporation for Atmospheric Research
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63       The use of this Software is governed by a License Agreement.
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67UNIX                          September 1997-1998            c_dspnt2d(3NCARG)
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