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comparison scripts/plot/surface.m @ 7109:5436efbf35e3

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[project @ 2007-11-06 22:16:25 by jwe]
author jwe
date Tue, 06 Nov 2007 22:16:25 +0000
parents
children 0e63f1126f01
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7108:60a1165732f9 7109:5436efbf35e3
1
2 ## Copyright (C) 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2002, 2004,
3 ## 2005, 2006, 2007 John W. Eaton
4 ##
5 ## This file is part of Octave.
6 ##
7 ## Octave is free software; you can redistribute it and/or modify it
8 ## under the terms of the GNU General Public License as published by
9 ## the Free Software Foundation; either version 3 of the License, or (at
10 ## your option) any later version.
11 ##
12 ## Octave is distributed in the hope that it will be useful, but
13 ## WITHOUT ANY WARRANTY; without even the implied warranty of
14 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 ## General Public License for more details.
16 ##
17 ## You should have received a copy of the GNU General Public License
18 ## along with Octave; see the file COPYING. If not, see
19 ## <http://www.gnu.org/licenses/>.
20
21 ## -*- texinfo -*-
22 ## @deftypefn {Function File} @var{h} = {} surface (@var{x}, @var{y}, @var{z}, @var{c})
23 ## @deftypefnx {Function File} @var{h} = {} surface (@var{x}, @var{y}, @var{z})
24 ## Plot a surface graphic object given matrices @var{x}, and @var{y} from @code{meshgrid} and
25 ## a matrix @var{z} corresponding to the @var{x} and @var{y} coordinates of
26 ## the surface. If @var{x} and @var{y} are vectors, then a typical vertex
27 ## is (@var{x}(j), @var{y}(i), @var{z}(i,j)). Thus, columns of @var{z}
28 ## correspond to different @var{x} values and rows of @var{z} correspond
29 ## to different @var{y} values.
30 ## @seealso{surf, mesh, patch, line}
31 ## @end deftypefn
32
33 ## Author: jwe
34
35 function h = surface (x, y, z, c)
36
37 ax = gca();
38
39 if (nargin == 1)
40 c = z = x;
41 if (ismatrix (z))
42 [nr, nc] = size (z);
43 x = 1:nc;
44 y = (1:nr)';
45 else
46 error ("surface: argument must be a matrix");
47 endif
48 elseif (nargin == 3)
49 if (isvector (x) && isvector (y) && ismatrix (z))
50 if (rows (z) == length (y) && columns (z) == length (x))
51 x = x(:)';
52 y = y(:);
53 else
54 msg = "surface: rows (z) must be the same as length (y) and";
55 msg = sprintf ("%s\ncolumns (z) must be the same as length (x)", msg);
56 error (msg);
57 endif
58 elseif (ismatrix (x) && ismatrix (y) && ismatrix (z))
59 if (! (size_equal (x, y) && size_equal (x, z)))
60 error ("surface: x, y, and z must have same dimensions");
61 endif
62 c = z;
63 else
64 error ("surface: x and y must be vectors and z must be a matrix");
65 endif
66 elseif (nargin == 4)
67 if !(size_equal (z, c))
68 error ("surface: z and c must have same size");
69 endif
70 if (isvector (x) && isvector (y) && ismatrix (z))
71 if (rows (z) == length (y) && columns (z) == length (x))
72 x = x(:)';
73 y = y(:);
74 else
75 msg = "surface: rows (z) must be the same as length (y) and";
76 msg = sprintf ("%s\ncolumns (z) must be the same as length (x)", msg);
77 error (msg);
78 endif
79 elseif (ismatrix (x) && ismatrix (y) && ismatrix (z))
80 if (! (size_equal (x, y) && size_equal (x, z)))
81 error ("surface: x, y, and z must have same dimensions");
82 endif
83 else
84 error ("surface: x and y must be vectors and z must be a matrix");
85 endif
86 else
87 print_usage ();
88 endif
89
90 ## make a default surface object
91 tmp = __go_surface__ (ax, "xdata", x, "ydata", y, "zdata", z, "cdata", c);
92
93 set (ax, "view", [0, 90], "box", "off");
94 set (tmp, "FaceColor","flat");
95
96 if (nargout > 0)
97 h = tmp;
98 endif
99
100 endfunction