X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;ds=sidebyside;f=octave_packages%2Fm%2Fplot%2Fsurf.m;fp=octave_packages%2Fm%2Fplot%2Fsurf.m;h=e136d433270ea02068a7ea3dd5b4f11a84d25afc;hb=1c0469ada9531828709108a4882a751d2816994a;hp=0000000000000000000000000000000000000000;hpb=63de9f36673d49121015e3695f2c336ea92bc278;p=CreaPhase.git
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+## Copyright (C) 2007-2012 Kai Habel
+##
+## 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
+## .
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} surf (@var{x}, @var{y}, @var{z})
+## @deftypefnx {Function File} {} surf (@var{z})
+## @deftypefnx {Function File} {} surf (@dots{}, @var{c})
+## @deftypefnx {Function File} {} surf (@var{hax}, @dots{})
+## @deftypefnx {Function File} {@var{h} =} surf (@dots{})
+## Plot a surface given matrices @var{x}, and @var{y} from @code{meshgrid} and
+## a matrix @var{z} corresponding to the @var{x} and @var{y} coordinates of
+## the mesh. If @var{x} and @var{y} are vectors, then a typical vertex
+## is (@var{x}(j), @var{y}(i), @var{z}(i,j)). 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 surface is derived from the @code{colormap} and
+## the value of @var{z}. Optionally the color of the surface can be
+## specified independent of @var{z}, by adding a fourth matrix, @var{c}.
+##
+## The optional return value @var{h} is a graphics handle to the created
+## surface object.
+## @seealso{colormap, contour, meshgrid, mesh}
+## @end deftypefn
+
+## Author: Kai Habel
+
+function retval = surf (varargin)
+
+ [h, varargin] = __plt_get_axis_arg__ ("surf", varargin{:});
+
+ oldh = gca ();
+ unwind_protect
+ axes (h);
+ newplot ();
+ tmp = surface (varargin{:});
+
+ if (! ishold ())
+ set (h, "view", [-37.5, 30],
+ "xgrid", "on", "ygrid", "on", "zgrid", "on");
+ endif
+ unwind_protect_cleanup
+ axes (oldh);
+ end_unwind_protect
+
+ if (nargout > 0)
+ retval = tmp;
+ endif
+
+endfunction
+
+
+%!demo
+%! clf
+%! [~,~,Z] = peaks;
+%! surf (Z);
+
+%!demo
+%! clf
+%! [~,~,Z] = sombrero;
+%! [Fx,Fy] = gradient (Z);
+%! surf (Z, Fx+Fy);
+%! shading interp;
+
+%!demo
+%! clf
+%! [X,Y,Z] = sombrero;
+%! [~,Fy] = gradient (Z);
+%! surf (X, Y, Z, Fy);
+%! shading interp;
+