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scripts/plot/contour3.m

changeset 10289: 4b124317dc38
parent:eb63fbe60fab
author: John W. Eaton <jwe@octave.org>
date: Tue Feb 09 20:58:55 2010 -0500 (43 minutes ago)
permissions: -rw-r--r--
description: base_properties::set_children: account for hidden children 
     1## Copyright (C) 2007, 2008, 2009 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} {} 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:

    32##

    33## @example

    34## @group

    35## contour3 (peaks (19));

    36## hold on

    37## surface (peaks (19), "facecolor", "none", "EdgeColor", "black")

    38## colormap hot

    39## @end group

    40## @end example

    41##

    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.

    45##

    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

    48## returned.

    49## @seealso{contourc, patch, plot}

    50## @end deftypefn

    51

    52function [c, h] = contour3 (varargin)

    53

    54  [xh, varargin, nargin] = __plt_get_axis_arg__ ("contour3", varargin{:});

    55

    56  oldh = gca ();

    57  unwind_protect

    58    axes (xh);

    59    newplot ();

    60    [ctmp, htmp] = __contour__ (xh, "auto", varargin{:});

    61  unwind_protect_cleanup

    62    axes (oldh);

    63  end_unwind_protect

    64

    65  if (! ishold ())

    66    set (xh, "view", [-37.5, 30]);

    67  endif

    68

    69  if (nargout > 0)

    70    c = ctmp;

    71    h = htmp;

    72  endif

    73

    74endfunction

    75

    76%!demo

    77%! contour3 (peaks (19));

    78%! hold on

    79%! surface (peaks (19), "facecolor", "none", "edgecolor", "black")

    80%! colormap hot

    81%! hold off