NAME

       c_dsgrid3d - primary double precision C entry for 3D gridding

FUNCTION PROTOTYPE

       double  *c_dsgrid3d(int, double [], double [], double [], double [],
                 int, int, int, double [], double [], double [], int *);

SYNOPSIS

       double  *c_dsgrid3d(int n, double x[], double y[], double z[],
                 double u[], int nx, int ny, int nz, double xo[],
                 double yo[], double zo[], int *ier);

DESCRIPTION

       n           The number of input data points.

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

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

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

       u           An  array  of size n containing the functional values of the input data points. That is, z[m]
                   is the value of the input function at coordinate (x[m],y[m],z[m]), for 0 <= m < n.

       nx          The number of X values in the output grid.

       ny          The number of Y values in the output grid.

       nz          The number of Z values in the output grid.

       xo          An array of size nx containing the X coordinates of the output data grid. The  values  in  xo
                   must be increasing, but need not be equally spaced.

       yo          An  array  of  size ny containing the Y coordinates of the output data grid. The values in yo
                   must be increasing, but need not be equally spaced.

       zo          An array of size nz containing the Z coordinates of the output data grid. The  values  in  zo
                   must be increasing, but need not be equally spaced.

       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

       c_dsgrid3d returns a pointer to a linear array of data that is the interpolated grid stored in  row-major
       order. That is, if out is declared as

         double *out;

       and we set:

         out = *c_dsgrid3d(n, x, y, z, u, nx, ny, nz, xo, yo, zo, ier);

       then  out[nz*ny*i  + nz*j + k] is the interpolated function value at coordinate point (xo[i],yo[j],zo[k])
       for 0 <= i < nx, 0 <= j < ny, and 0 <= k < nz. The space for out is allocated internal to c_dsgrid3d  and
       is nx*ny*nz doubles in size.

ACCESS

       To use c_dsgrid3d, load the NCAR Graphics library ngmath.

SEE ALSO

       dsgrid, dsgrid_params, c_dsseti, c_dsgeti, c_dssetrd, c_dsgetrd, c_dssetc, c_dsgetc.

       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.

UNIX                                           September 1997-1998                            c_dsgrid3d(3NCARG)