1c_dsgrid3d(3NCARG)               NCAR GRAPHICS              c_dsgrid3d(3NCARG)
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NAME

6       c_dsgrid3d - primary double precision C entry for 3D gridding
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FUNCTION PROTOTYPE

9       double  *c_dsgrid3d(int, double [], double [], double [], double [],
10                 int, int, int, double [], double [], double [], int *);
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SYNOPSIS

13       double  *c_dsgrid3d(int n, double x[], double y[], double z[],
14                 double u[], int nx, int ny, int nz, double xo[],
15                 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  Z coordinates of the input data
27                   points.
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29       u           An array of size n containing the functional values of  the
30                   input  data points. That is, z[m] is the value of the input
31                   function at coordinate (x[m],y[m],z[m]), for 0 <= m < n.
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33       nx          The number of X values in the output grid.
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35       ny          The number of Y values in the output grid.
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37       nz          The number of Z values in the output grid.
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39       xo          An array of size nx containing the  X  coordinates  of  the
40                   output  data grid. The values in xo must be increasing, but
41                   need not be equally spaced.
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43       yo          An array of size ny containing the  Y  coordinates  of  the
44                   output  data grid. The values in yo must be increasing, but
45                   need not be equally spaced.
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47       zo          An array of size nz containing the  Z  coordinates  of  the
48                   output  data grid. The values in zo must be increasing, but
49                   need not be equally spaced.
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51       ier         An error return value. If *ier is returned as  0,  then  no
52                   errors  were  detected.  If *ier is non-zero, then refer to
53                   the man page for dsgrid_errors.
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USAGE

56       c_dsgrid3d returns a pointer to a linear array  of  data  that  is  the
57       interpolated  grid  stored  in  row-major  order.  That  is,  if out is
58       declared as
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60         double *out;
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62       and we set:
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64         out = *c_dsgrid3d(n, x, y, z, u, nx, ny, nz, xo, yo, zo, ier);
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66       then out[nz*ny*i + nz*j + k] is  the  interpolated  function  value  at
67       coordinate  point (xo[i],yo[j],zo[k]) for 0 <= i < nx, 0 <= j < ny, and
68       0 <= k < nz. The space for out is allocated internal to c_dsgrid3d  and
69       is nx*ny*nz doubles in size.
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ACCESS

72       To use c_dsgrid3d, load the NCAR Graphics library ngmath.
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SEE ALSO

75       dsgrid,   dsgrid_params,   c_dsseti,  c_dsgeti,  c_dssetrd,  c_dsgetrd,
76       c_dssetc, c_dsgetc.
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78       Complete documentation for Dsgrid is available at URL
79       http://ngwww.ucar.edu/ngdoc/ng/ngmath/dsgrid/dshome.html
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82       Copyright (C) 2000
83       University Corporation for Atmospheric Research
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85       The use of this Software is governed by a License Agreement.
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89UNIX                          September 1997-1998           c_dsgrid3d(3NCARG)
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