NAME

       c_dsgrid2d - primary double precision C entry for 2D gridding

FUNCTION PROTOTYPE

       double *c_dsgrid2d(int, double [], double [], double [],
                         int, int, double [], double [], int *);

SYNOPSIS

       double *c_dsgrid2d(int n, double x[], double y[], double z[],
                          int nx, int ny, double xo[], double yo[], 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  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]), for 0 <= m < n.

       nx          The number of X values in the output grid.

       ny          The number of Y 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.

       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_dsgrid2d  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_dsgrid2d(n, x, y, z, nx, ny, xo, yo, ier);

       then out[i*ny+j] is the interpolated function value at coordinate point (xo[i],yo[j]) for 0 <= i < nx and
       0 <= j < ny. The space for out is allocated internal to c_dsgrid2d and is nx*ny doubles in size.

ACCESS

       To use c_dsgrid2d, 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_dsgrid2d(3NCARG)