1 ## Copyright (C) 2007-2012 David BAteman
3 ## This file is part of Octave.
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.
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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.
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/>.
20 ## @deftypefn {Function File} {} contour3 (@var{z})
21 ## @deftypefnx {Function File} {} contour3 (@var{z}, @var{vn})
22 ## @deftypefnx {Function File} {} contour3 (@var{x}, @var{y}, @var{z})
23 ## @deftypefnx {Function File} {} contour3 (@var{x}, @var{y}, @var{z}, @var{vn})
24 ## @deftypefnx {Function File} {} contour3 (@dots{}, @var{style})
25 ## @deftypefnx {Function File} {} contour3 (@var{h}, @dots{})
26 ## @deftypefnx {Function File} {[@var{c}, @var{h}] =} contour3 (@dots{})
27 ## Plot level curves (contour lines) of the matrix @var{z}, using the
28 ## contour matrix @var{c} computed by @code{contourc} from the same
29 ## arguments; see the latter for their interpretation. The contours are
30 ## plotted at the Z level corresponding to their contour. The set of
31 ## contour levels, @var{c}, is only returned if requested. For example:
35 ## contour3 (peaks (19));
37 ## surface (peaks (19), "facecolor", "none", "EdgeColor", "black");
42 ## The style to use for the plot can be defined with a line style @var{style}
43 ## in a similar manner to the line styles used with the @code{plot} command.
44 ## Any markers defined by @var{style} are ignored.
46 ## The optional input and output argument @var{h} allows an axis handle to
47 ## be passed to @code{contour} and the handles to the contour objects to be
49 ## @seealso{contourc, patch, plot}
52 function [c, h] = contour3 (varargin)
54 [xh, varargin, nargin] = __plt_get_axis_arg__ ("contour3", varargin{:});
60 [ctmp, htmp] = __contour__ (xh, "auto", varargin{:});
61 unwind_protect_cleanup
66 set (xh, "view", [-37.5, 30],
67 "xgrid", "on", "ygrid", "on", "zgrid", "on");
79 %! contour3 (peaks (19));
81 %! surface (peaks (19), "facecolor", "none", "edgecolor", "black")