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maint: Periodic merge of gui-release to default.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 10:24:46 -0500
parents 4d75bda5df80 446c46af4b42
children 4197fc428c7d
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d63878346099 maint: Update copyright notices for release.
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1996-2013 John W. Eaton
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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} {} surfc (@var{x}, @var{y}, @var{z})
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21 ## @deftypefnx {Function File} {} surfc (@var{z})
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22 ## @deftypefnx {Function File} {} surfc (@dots{}, @var{c})
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23 ## @deftypefnx {Function File} {} surfc (@dots{}, @var{prop}, @var{val}, @dots{})
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24 ## @deftypefnx {Function File} {} surfc (@var{hax}, @dots{})
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25 ## @deftypefnx {Function File} {@var{h} =} surfc (@dots{})
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26 ## Plot a 3-D surface mesh with underlying contour lines.
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27 ##
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28 ## The surface mesh is plotted using shaded rectangles. The vertices of the
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29 ## rectangles [@var{x}, @var{y}] are typically the output of @code{meshgrid}.
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30 ## over a 2-D rectangular region in the x-y plane. @var{z} determines the
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31 ## height above the plane of each vertex. If only a single @var{z} matrix is
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32 ## given, then it is plotted over the meshgrid
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33 ## @code{@var{x} = 1:columns (@var{z}), @var{y} = 1:rows (@var{z})}.
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34 ## Thus, columns of @var{z} correspond to different @var{x} values and rows
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35 ## of @var{z} correspond to different @var{y} values.
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36 ##
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37 ## The color of the surface is computed by linearly scaling the @var{z} values
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38 ## to fit the range of the current colormap. Use @code{caxis} and/or
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39 ## change the colormap to control the appearance.
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40 ##
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41 ## Optionally, the color of the surface can be specified independently of
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42 ## @var{z} by supplying a color matrix, @var{c}.
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43 ##
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44 ## Any property/value pairs are passed directly to the underlying surface
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45 ## object.
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46 ##
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47 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
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48 ## rather than the current axes returned by @code{gca}.
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49 ##
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50 ## The optional return value @var{h} is a graphics handle to the created
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51 ## surface object.
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52 ##
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53 ## Note: The exact appearance of the surface can be controlled with the
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54 ## @code{shading} command or by using @code{set} to control surface object
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55 ## properties.
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56 ## @seealso{ezsurfc, surf, surfl, surfnorm, trisurf, contour, mesh, surface, meshgrid, hidden, shading, colormap, caxis}
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57 ## @end deftypefn
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58
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59 function h = surfc (varargin)
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60
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61 [hax, varargin, nargin] = __plt_get_axis_arg__ ("surfc", varargin{:});
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62
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63 if (nargin < 1)
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64 print_usage ();
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65 endif
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66
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67 oldfig = [];
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68 if (! isempty (hax))
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69 oldfig = get (0, "currentfigure");
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70 endif
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71 unwind_protect
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72 hax = newplot (hax);
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73
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74 surfc_props = {"facecolor", "flat"};
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75 chararg = find (cellfun ("isclass", varargin, "char"), 1);
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76 if (isempty (chararg))
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77 htmp = surface (varargin{:}, surfc_props{:});
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78 else
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79 htmp = surface (varargin{1:chararg-1}, surfc_props{:},
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80 varargin{chararg:end});
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81 endif
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82
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83 if (! ishold ())
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84 set (hax, "view", [-37.5, 30],
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85 "xgrid", "on", "ygrid", "on", "zgrid", "on",
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86 "xlimmode", "manual", "ylimmode", "manual");
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87 endif
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88
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89 drawnow ();
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90
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91 ## don't pass string arguments to __contour__()
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92 stop_idx = find (cellfun ("isclass", varargin, "char"), 1);
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93 if (isempty (stop_idx))
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94 stop_idx = nargin;
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95 else
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96 stop_idx--;
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97 endif
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98
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99 if (stop_idx - 1 == 1 || stop_idx - 1 == 3)
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100 ## Don't pass a color matrix c to __contour__
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101 stop_idx -= 1;
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102 endif
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103
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104 zmin = get (hax, "zlim")(1);
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105 [~, htmp2] = __contour__ (hax, zmin, varargin{1:stop_idx});
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106
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107 htmp = [htmp; htmp2];
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108
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109 unwind_protect_cleanup
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110 if (! isempty (oldfig))
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111 set (0, "currentfigure", oldfig);
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112 endif
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113 end_unwind_protect
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114
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115 if (nargout > 0)
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116 h = htmp;
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117 endif
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118
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119 endfunction
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120
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4c93cc41da15 codesprint: add demo for surf.m and surfc.m
Kai Habel <kai.habel@gmx.de>
parents: 11589
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122 %!demo
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123 %! clf;
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124 %! colormap ('default');
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d4549655b92e Rephrase %!tests to take advantage of single output form of peaks().
Rik <rik@octave.org>
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125 %! Z = peaks ();
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Rik <octave@nomad.inbox5.com>
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126 %! surfc (Z);
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127 %! title ('surfc() combines surf/contour plots');
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Rik <octave@nomad.inbox5.com>
parents: 14138
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128
ba7a26030214 Use Octave spacing convention in %!test blocks of surface plot functions.
Rik <octave@nomad.inbox5.com>
parents: 14138
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129 %!demo
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Rik <octave@nomad.inbox5.com>
parents: 14223
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130 %! clf;
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Rik <octave@nomad.inbox5.com>
parents: 14237
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131 %! colormap ('default');
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a639221f9863 sombrero.m: Overhaul documentation and make calling forms equivalent to peaks()
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132 %! Z = sombrero ();
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133 %! [Fx,Fy] = gradient (Z);
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parents: 14138
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134 %! surfc (Z, Fx+Fy);
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parents: 11589
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135 %! shading interp;
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Rik <rik@octave.org>
parents: 17167
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136 %! title ({'surfc() plot of sombrero() function'; ...
df4c4b7708a4 Add titles and clean-up plotting %!demos.
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parents: 17167
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137 %! 'facecolor is interpolated, color determined by gradient of Z'});
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Kai Habel <kai.habel@gmx.de>
parents: 11589
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138
4c93cc41da15 codesprint: add demo for surf.m and surfc.m
Kai Habel <kai.habel@gmx.de>
parents: 11589
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139 %!demo
14237
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Rik <octave@nomad.inbox5.com>
parents: 14223
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140 %! clf;
14247
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Rik <octave@nomad.inbox5.com>
parents: 14237
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141 %! colormap ('default');
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Rik <octave@nomad.inbox5.com>
parents: 14223
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142 %! [X,Y,Z] = sombrero ();
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14223
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143 %! [~,Fy] = gradient (Z);
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Rik <octave@nomad.inbox5.com>
parents: 14138
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144 %! surfc (X,Y,Z,Fy);
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parents: 11589
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145 %! shading interp;
17190
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Rik <rik@octave.org>
parents: 17167
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146 %! title ({'surfc() plot of peaks() function'; ...
df4c4b7708a4 Add titles and clean-up plotting %!demos.
Rik <rik@octave.org>
parents: 17167
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147 %! 'facecolor is interpolated, color determined by Y-gradient of Z'});
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parents: 14223
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148