Mercurial > octave
view scripts/plot/draw/mesh.m @ 23083:e9a0469dedd9 stable
maint: strip extra trailing newlines from files.
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 20 Jan 2017 12:19:08 -0500 |
parents | 886530282db9 |
children | ef4d915df748 3ac9f9ecfae5 |
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## Copyright (C) 1993-2016 John W. Eaton ## ## This file is part of Octave. ## ## Octave is free software; you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or (at ## your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {} {} mesh (@var{x}, @var{y}, @var{z}) ## @deftypefnx {} {} mesh (@var{z}) ## @deftypefnx {} {} mesh (@dots{}, @var{c}) ## @deftypefnx {} {} mesh (@dots{}, @var{prop}, @var{val}, @dots{}) ## @deftypefnx {} {} mesh (@var{hax}, @dots{}) ## @deftypefnx {} {@var{h} =} mesh (@dots{}) ## Plot a 3-D wireframe mesh. ## ## The wireframe mesh is plotted using rectangles. The vertices of the ## rectangles [@var{x}, @var{y}] are typically the output of @code{meshgrid}. ## over a 2-D rectangular region in the x-y plane. @var{z} determines the ## height above the plane of each vertex. If only a single @var{z} matrix is ## given, then it is plotted over the meshgrid ## @code{@var{x} = 1:columns (@var{z}), @var{y} = 1:rows (@var{z})}. ## Thus, columns of @var{z} correspond to different @var{x} values and rows ## of @var{z} correspond to different @var{y} values. ## ## The color of the mesh is computed by linearly scaling the @var{z} values ## to fit the range of the current colormap. Use @code{caxis} and/or ## change the colormap to control the appearance. ## ## Optionally, the color of the mesh can be specified independently of @var{z} ## by supplying a color matrix, @var{c}. ## ## Any property/value pairs are passed directly to the underlying surface ## object. ## ## If the first argument @var{hax} is an axes handle, then plot into this axis, ## rather than the current axes returned by @code{gca}. ## ## The optional return value @var{h} is a graphics handle to the created ## surface object. ## ## @seealso{ezmesh, meshc, meshz, trimesh, contour, surf, surface, meshgrid, hidden, shading, colormap, caxis} ## @end deftypefn ## Author: jwe function h = mesh (varargin) if (! all (cellfun ("isreal", varargin))) error ("mesh: X, Y, Z, C arguments must be real"); endif [hax, varargin, nargin] = __plt_get_axis_arg__ ("mesh", varargin{:}); oldfig = []; if (! isempty (hax)) oldfig = get (0, "currentfigure"); endif unwind_protect hax = newplot (hax); mesh_props = {"facecolor", "w", "edgecolor", "flat", ... "facelighting", "none", "edgelighting", "flat"}; chararg = find (cellfun ("isclass", varargin, "char"), 1); if (isempty (chararg)) htmp = surface (varargin{:}, mesh_props{:}); else htmp = surface (varargin{1:chararg-1}, mesh_props{:}, varargin{chararg:end}); endif if (! ishold ()) set (hax, "view", [-37.5, 30], "xgrid", "on", "ygrid", "on", "zgrid", "on"); endif unwind_protect_cleanup if (! isempty (oldfig)) set (0, "currentfigure", oldfig); endif end_unwind_protect if (nargout > 0) h = htmp; endif endfunction %!demo %! clf; %! x = logspace (0,1,11); %! z = x'*x; %! mesh (x, x, z); %! xlabel "X-axis"; %! ylabel "Y-axis"; %! zlabel "Z-axis"; %! title ("mesh() with color proportional to height"); %!demo %! clf; %! x = logspace (0,1,11); %! z = x'*x; %! mesh (x, x, z, z.^2); %! xlabel "X-axis"; %! ylabel "Y-axis"; %! zlabel "linear scale"; %! title ("mesh() with color proportional to Z^2"); %!demo %! clf; %! x = logspace (0,1,11); %! z = x'*x; %! mesh (x, x, z, z.^2); %! set (gca, "zscale", "log"); %! xlabel "X-axis"; %! ylabel "Y-axis"; %! zlabel "log scale"; %! title ({"mesh() with color proportional to Z^2", "Z-axis is log scale"}); %! try %! if (strcmp (get (gcf, "__graphics_toolkit__"), "gnuplot")) %! title ({"Gnuplot: mesh color is wrong", "This is a Gnuplot bug"}); %! endif %! catch %! end_try_catch %!demo %! clf; %! x = logspace (0,1,11); %! z = x'*x; %! mesh (x, x, z, "facecolor", "none", "edgecolor", "c"); %! xlabel "X-axis"; %! ylabel "Y-axis"; %! zlabel "Z-axis"; %! title ({"mesh() default properties overridden", ... %! "transparent mesh with cyan color"});