NAME

       c_dspnt3d - interpolate double precision 3D data at specified points

FUNCTION PROTOTYPE

       void c_dspnt3d(int, double [], double [], double [], double[]
       int, double [], double [], double [], double *, int *);

SYNOPSIS

       void c_dspnt3d(int n, double xi[], double yi[], double zi[], double ui[],
                      int m, double xo[], double yo[], double zo[], double *uo,
                      int *ier)

DESCRIPTION

       n           The number of input data points.

       xi          An array containing the X coordinates of the input data points.

       yi          An array containing the Y coordinates of the input data points.

       zi          An array containing the Z coordinates of the input data points.

       ui          An array containing the functional values of the input data points. That is,
                   ui[l] is the value of the input function at coordinate (xi[l],yi[l],zi[l]),
                   for 0 <= l < n .

       m           The number of output data points (this may be "1").

       xo          An array of dimension m containing the X coordinates of the output data. The
                   values in xo may be in any order.

       yo          An array of dimension m containing the Y coordinates of the output data. The
                   values in xo may be in any order.

       zo          An array of dimension m containing the Z coordinates of the output data. The
                   values in xo may be in any order.

       uo          A pointer to a double. Space for m doubles is allocated for uo by dspnt3d.
                   zo[i] is the interpolated value at point (xo[i],yo[i],zo[i]) for 0 <= i < n .

       ier         An error return value. If *ier is returned as 0, then no errors were detected.
                   If *ier is non-zero, then refer to the man page for dsgrid_errors.

USAGE

       This function is called to interpolate double precision 3D data at a specified point or
       points.

ACCESS

       To use c_dspnt3d, load the NCAR Graphics library ngmath.

SEE ALSO

       dsgrid, dsgrid_params.

       Complete documentation for Dsgrid is available at URL
       http://ngwww.ucar.edu/ngdoc/ng/ngmath/dsgrid/dshome.html

COPYRIGHT

       Copyright (C) 2000
       University Corporation for Atmospheric Research

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