|
7337
|
1 ## Copyright (C) 2007 David Bateman |
|
|
2 ## |
|
|
3 ## This file is part of Octave. |
|
|
4 ## |
|
|
5 ## Octave is free software; you can redistribute it and/or modify it |
|
|
6 ## under the terms of the GNU General Public License as published by |
|
|
7 ## the Free Software Foundation; either version 3 of the License, or (at |
|
|
8 ## your option) any later version. |
|
|
9 ## |
|
|
10 ## Octave is distributed in the hope that it will be useful, but |
|
|
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
|
13 ## General Public License for more details. |
|
|
14 ## |
|
|
15 ## You should have received a copy of the GNU General Public License |
|
|
16 ## along with Octave; see the file COPYING. If not, see |
|
|
17 ## <http://www.gnu.org/licenses/>. |
|
|
18 |
|
|
19 ## -*- texinfo -*- |
|
|
20 ## @deftypefn {Function File} {} ezsurfc (@var{f}) |
|
|
21 ## @deftypefnx {Function File} {} ezsurfc (@var{fx}, @var{fy}, @var{fz}) |
|
|
22 ## @deftypefnx {Function File} {} ezsurfc (@dots{}, @var{dom}) |
|
|
23 ## @deftypefnx {Function File} {} ezsurfc (@dots{}, @var{n}) |
|
|
24 ## @deftypefnx {Function File} {} ezsurfc (@dots{}, 'circ') |
|
|
25 ## @deftypefnx {Function File} {} ezsurfc (@var{h}, @dots{}) |
|
|
26 ## @deftypefnx {Function File} {@var{h} =} ezsurfc (@dots{}) |
|
|
27 ## |
|
|
28 ## Plots the surface and contour lines defined by a function. @var{f} is a |
|
|
29 ## string, inline function or function handle with two arguments defining the |
|
|
30 ## function. By default the plot is over the domain @code{-2*pi < @var{x} < |
|
|
31 ## 2*pi} and @code{-2*pi < @var{y} < 2*pi} with 60 points in each dimension. |
|
|
32 ## |
|
|
33 ## If @var{dom} is a two element vector, it represents the minimum and maximum |
|
|
34 ## value of both @var{x} and @var{y}. If @var{dom} is a four element vector, |
|
|
35 ## then the minimum and maximum value of @var{x} and @var{y} are specify |
|
|
36 ## separately. |
|
|
37 ## |
|
|
38 ## @var{n} is a scalar defining the number of points to use in each dimension. |
|
|
39 ## |
|
|
40 ## If three functions are passed, then plot the parametrically defined |
|
|
41 ## function @code{[@var{fx} (@var{s}, @var{t}), @var{fy} (@var{s}, @var{t}), |
|
|
42 ## @var{fz} (@var{s}, @var{t})]}. |
|
|
43 ## |
|
|
44 ## If the argument 'circ' is given, then the function is plotted over a disk |
|
|
45 ## centered on the middle of the domain @var{dom}. |
|
|
46 ## |
|
|
47 ## The optional return value @var{h} provides a list of handles to the |
|
|
48 ## the parts of the vector field (body, arrow and marker). |
|
|
49 ## |
|
|
50 ## @example |
|
|
51 ## @group |
|
|
52 ## f = @@(x,y) sqrt(abs(x .* y)) ./ (1 + x.^2 + y.^2); |
|
|
53 ## ezsurfc (f, [-3, 3]); |
|
|
54 ## @end group |
|
|
55 ## @end example |
|
|
56 ## |
|
|
57 ## @seealso{ezplot, ezmeshc, ezsurf, ezmesh} |
|
|
58 ## @end deftypefn |
|
|
59 |
|
|
60 function retval = ezsurfc (varargin) |
|
|
61 |
|
|
62 [h, needusage] = __ezplot__ ("surfc", varargin{:}); |
|
|
63 |
|
|
64 if (needusage) |
|
|
65 print_usage (); |
|
|
66 endif |
|
|
67 |
|
|
68 if (nargout > 0) |
|
|
69 retval = h; |
|
|
70 endif |
|
|
71 endfunction |
|
|
72 |
|
|
73 %!demo |
|
|
74 %! f = @(x,y) sqrt(abs(x .* y)) ./ (1 + x.^2 + y.^2); |
|
|
75 %! ezsurfc (f, [-3, 3]); |
