1c_dsgrid2d(3NCARG)               NCAR GRAPHICS              c_dsgrid2d(3NCARG)
2
3
4

NAME

6       c_dsgrid2d - primary double precision C entry for 2D gridding
7

FUNCTION PROTOTYPE

9       double *c_dsgrid2d(int, double [], double [], double [],
10                         int, int, double [], double [], int *);
11
12

SYNOPSIS

14       double *c_dsgrid2d(int n, double x[], double y[], double z[],
15                          int nx, int ny, double xo[], double yo[], int *ier)
16

DESCRIPTION

18       n           The number of input data points.
19
20       x           An  array  containing  the  X coordinates of the input data
21                   points.
22
23       y           An array containing the Y coordinates  of  the  input  data
24                   points.
25
26       z           An  array of size n containing the functional values of the
27                   input data points. That is, z[m] is the value of the  input
28                   function at coordinate (x[m],y[m]), for 0 <= m < n.
29
30       nx          The number of X values in the output grid.
31
32       ny          The number of Y values in the output grid.
33
34       xo          An  array  of  size  nx containing the X coordinates of the
35                   output data grid. The values in xo must be increasing,  but
36                   need not be equally spaced.
37
38       yo          An  array  of  size  ny containing the Y coordinates of the
39                   output data grid. The values in yo must be increasing,  but
40                   need not be equally spaced.
41
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.
45

USAGE

47       c_dsgrid2d  returns  a  pointer  to  a linear array of data that is the
48       interpolated grid stored  in  row-major  order.  That  is,  if  out  is
49       declared as
50
51       double *out;
52
53       and we set:
54
55         out = c_dsgrid2d(n, x, y, z, nx, ny, xo, yo, ier);
56
57       then out[i*ny+j] is the interpolated function value at coordinate point
58       (xo[i],yo[j]) for 0 <= i < nx and 0 <= j < ny. The  space  for  out  is
59       allocated internal to c_dsgrid2d and is nx*ny doubles in size.
60

ACCESS

62       To use c_dsgrid2d, load the NCAR Graphics library ngmath.
63

SEE ALSO

65       dsgrid,   dsgrid_params,   c_dsseti,  c_dsgeti,  c_dssetrd,  c_dsgetrd,
66       c_dssetc, c_dsgetc.
67
68       Complete documentation for Dsgrid is available at URL
69       http://ngwww.ucar.edu/ngdoc/ng/ngmath/dsgrid/dshome.html
70

72       Copyright (C) 2000
73       University Corporation for Atmospheric Research
74
75       The use of this Software is governed by a License Agreement.
76
77
78
79UNIX                          September 1997-1998           c_dsgrid2d(3NCARG)
Impressum