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annotate scripts/plot/surf.m @ 14872:c2dbdeaa25df

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maint: use rows() and columns() to clarify m-files. * gradient.m, interp1q.m, rat.m, tsearchn.m, image.m, imwrite.m, area.m, contourc.m, hist.m, isocolors.m, isonormals.m, meshz.m, print.m, __bar__.m, __go_draw_axes__.m, __interp_cube__.m, __marching_cube__.m, __patch__.m, __print_parse_opts__.m, __quiver__.m, rose.m, shrinkfaces.m, stairs.m, surfnorm.m, tetramesh.m, text.m, deconv.m, spline.m, intersect.m, setdiff.m, setxor.m, union.m, periodogram.m, pcg.m, perms.m: Replace size (x,1) with rows (x) and size(x,2) with columns(x).
author Rik <octave@nomad.inbox5.com>
date Tue, 17 Jul 2012 13:34:19 -0700
parents c4fa5e0b6193
children 1118d566bcd4
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14138
72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2007-2012 Kai Habel
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} surf (@var{x}, @var{y}, @var{z})
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21 ## @deftypefnx {Function File} {} surf (@var{z})
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22 ## @deftypefnx {Function File} {} surf (@dots{}, @var{c})
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23 ## @deftypefnx {Function File} {} surf (@var{hax}, @dots{})
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24 ## @deftypefnx {Function File} {@var{h} =} surf (@dots{})
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25 ## Plot a surface given matrices @var{x}, and @var{y} from @code{meshgrid} and
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26 ## a matrix @var{z} corresponding to the @var{x} and @var{y} coordinates of
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27 ## the mesh. If @var{x} and @var{y} are vectors, then a typical vertex
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28 ## is (@var{x}(j), @var{y}(i), @var{z}(i,j)). Thus, columns of @var{z}
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29 ## correspond to different @var{x} values and rows of @var{z} correspond
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30 ## to different @var{y} values.
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31 ##
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32 ## The color of the surface is derived from the @code{colormap} and
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33 ## the value of @var{z}. Optionally the color of the surface can be
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34 ## specified independent of @var{z}, by adding a fourth matrix, @var{c}.
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35 ##
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36 ## The optional return value @var{h} is a graphics handle to the created
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37 ## surface object.
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38 ## @seealso{colormap, contour, meshgrid, mesh}
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39 ## @end deftypefn
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40
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41 ## Author: Kai Habel <kai.habel@gmx.de>
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42
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43 function retval = surf (varargin)
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44
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45 [h, varargin] = __plt_get_axis_arg__ ("surf", varargin{:});
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46
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47 oldh = gca ();
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48 unwind_protect
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49 axes (h);
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50 newplot ();
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51 tmp = surface (varargin{:});
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52
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53 if (! ishold ())
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54 set (h, "view", [-37.5, 30],
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55 "xgrid", "on", "ygrid", "on", "zgrid", "on");
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56 endif
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57 unwind_protect_cleanup
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58 axes (oldh);
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59 end_unwind_protect
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60
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61 if (nargout > 0)
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62 retval = tmp;
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63 endif
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64
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65 endfunction
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66
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67
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68 %!demo
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69 %! clf;
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70 %! colormap ('default');
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71 %! [~,~,Z] = peaks ();
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72 %! surf (Z);
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73
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74 %!demo
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75 %! clf;
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76 %! colormap ('default');
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77 %! [~,~,Z] = sombrero ();
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78 %! [Fx,Fy] = gradient (Z);
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79 %! surf (Z, Fx+Fy);
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80 %! shading interp;
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81
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82 %!demo
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83 %! clf;
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84 %! colormap ('default');
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85 %! [X,Y,Z] = sombrero ();
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86 %! [~,Fy] = gradient (Z);
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87 %! surf (X, Y, Z, Fy);
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88 %! shading interp;
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89