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Add titles and clean-up plotting %!demos. * scripts/plot/area.m, scripts/plot/axis.m, scripts/plot/bar.m, scripts/plot/barh.m, scripts/plot/clabel.m, scripts/plot/colorbar.m, scripts/plot/comet.m, scripts/plot/comet3.m, scripts/plot/contour.m, scripts/plot/contour3.m, scripts/plot/contourf.m, scripts/plot/cylinder.m, scripts/plot/ellipsoid.m, scripts/plot/errorbar.m, scripts/plot/ezplot.m, scripts/plot/ezplot3.m, scripts/plot/ezpolar.m, scripts/plot/feather.m, scripts/plot/fplot.m, scripts/plot/hold.m, scripts/plot/isosurface.m, scripts/plot/legend.m, scripts/plot/loglog.m, scripts/plot/loglogerr.m, scripts/plot/mesh.m, scripts/plot/meshc.m, scripts/plot/meshz.m, scripts/plot/patch.m, scripts/plot/pcolor.m, scripts/plot/pie.m, scripts/plot/pie3.m, scripts/plot/plot.m, scripts/plot/plot3.m, scripts/plot/polar.m, scripts/plot/rectangle.m, scripts/plot/ribbon.m, scripts/plot/rose.m, scripts/plot/scatter.m, scripts/plot/scatter3.m, scripts/plot/semilogx.m, scripts/plot/semilogxerr.m, scripts/plot/semilogy.m, scripts/plot/semilogyerr.m, scripts/plot/sombrero.m, scripts/plot/stem3.m, scripts/plot/surf.m, scripts/plot/surfc.m, scripts/plot/surfl.m, scripts/plot/title.m, scripts/plot/waterfall.m: Add titles and clean-up plotting %!demos.
author Rik <rik@octave.org>
date Tue, 06 Aug 2013 14:34:20 -0700
parents eaab03308c0b
children bc924baa2c4e
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1 ## Copyright (C) 2008-2012 David Bateman
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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} {} clabel (@var{c}, @var{h})
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21 ## @deftypefnx {Function File} {} clabel (@var{c}, @var{h}, @var{v})
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22 ## @deftypefnx {Function File} {} clabel (@var{c}, @var{h}, "manual")
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23 ## @deftypefnx {Function File} {} clabel (@var{c})
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24 ## @deftypefnx {Function File} {} clabel (@dots{}, @var{prop}, @var{val}, @dots{})
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25 ## @deftypefnx {Function File} {@var{h} =} clabel (@dots{})
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26 ## Add labels to the contours of a contour plot.
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27 ##
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28 ## The contour levels are specified by the contour matrix @var{c} which is
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29 ## returned by @code{contour}, @code{contourc}, @code{contourf}, and
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30 ## @code{contour3}. Contour labels are rotated to match the local line
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31 ## orientation and centered on the line. The position of labels along the
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32 ## contour line is chosen randomly.
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33 ##
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34 ## If the argument @var{h} is a handle to a contour group object, then label
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35 ## this plot rather than the one in the current axes returned by @code{gca}.
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36 ##
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37 ## By default, all contours are labeled. However, the contours to label can be
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38 ## specified by the vector @var{v}. If the "manual" argument is given then
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39 ## the contours to label can be selected with the mouse.
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40 ##
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41 ## Additional property/value pairs that are valid properties of text objects
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42 ## can be given and are passed to the underlying text objects. Moreover,
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43 ## the contour group property "LabelSpacing" is available which determines
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44 ## the spacing between labels on a contour to be specified. The default is
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45 ## 144 points, or 2 inches.
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46 ##
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47 ## The optional return value @var{h} is a vector of graphics handles to
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48 ## the text objects representing each label.
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49 ## The "userdata" property of the text objects contains the numerical value of
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50 ## the contour label.
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51 ##
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52 ## An example of the use of @code{clabel} is
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53 ##
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54 ## @example
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55 ## @group
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56 ## [c, h] = contour (peaks (), -4 : 6);
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57 ## clabel (c, h, -4:2:6, "fontsize", 12);
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58 ## @end group
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59 ## @end example
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60 ##
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61 ## @seealso{contour, contourf, contour3, meshc, surfc, text}
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62 ## @end deftypefn
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63
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64 function retval = clabel (c, varargin)
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65
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66 label_spacing = 2 * 72;
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67 have_hg = false;
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68 have_labelspacing = false;
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69
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70 if (nargin < 1)
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71 print_usage ();
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72 elseif (nargin == 1)
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73 hparent = gca ();
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74 else
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75 arg = varargin{1};
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76 if (isscalar (arg) && ishandle (arg)
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77 && strcmp (get (arg, "type"), "hggroup"))
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78 obj = get (arg);
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79 if (! isfield (obj, "contourmatrix"))
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80 error ("clabel: expecting the handle to be a contour group");
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81 endif
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82 hg = arg;
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83 have_hg = true;
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84 varargin(1) = [];
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85 else
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86 hparent = gca ();
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87 endif
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88 endif
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89
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90 if (length (varargin) > 0 && isnumeric (varargin{1}))
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91 v = varargin{1}(:);
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92 varargin(1) = [];
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93 else
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94 v = [];
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95 endif
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96
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97 for i = 1 : length (varargin) - 1
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98 arg = varargin{i};
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99 if (strcmpi (arg, "labelspacing"))
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100 label_spacing = varargin{i+1};
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101 have_labelspacing = true;
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102 varargin(i:i+1) = [];
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103 break;
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104 endif
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105 endfor
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106
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107 for i = 1 : length (varargin)
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108 arg = varargin{i};
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109 if (strcmpi (arg, "manual"))
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110 error ("clabel: manual contouring mode not supported");
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111 endif
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112 endfor
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113
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114 if (have_hg)
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115 if (! isempty (v))
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116 if (have_labelspacing)
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117 set (hg, "textlistmode", "manual", "textlist", v,
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118 "labelspacing", label_spacing, "showtext", "on");
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119 else
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120 set (hg, "textlistmode", "manual", "textlist", v, "showtext", "on");
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121 endif
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122 else
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123 if (have_labelspacing)
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124 set (hg,"showtext", "on", "labelspacing", label_spacing);
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125 else
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126 set (hg,"showtext", "on");
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127 endif
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128 endif
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129 retval = findobj (hg, "type", "text");
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130 if (! isempty (varargin))
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131 set (retval, varargin {:});
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132 endif
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133 else
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134 retval = __clabel__ (c, v, hparent, label_spacing, [], varargin{:});
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135 endif
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136
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137 endfunction
ac7f334d9652 Add contour group objects and the clabel function
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138
ac7f334d9652 Add contour group objects and the clabel function
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ac7f334d9652 Add contour group objects and the clabel function
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140 %!demo
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141 %! clf;
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142 %! colormap ('default');
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143 %! [c, h] = contour (peaks (), -4:6);
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144 %! clabel (c, h, -4:2:6, 'fontsize', 12);
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145 %! title ('clabel() labeling every other contour');
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146
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147 %!demo
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148 %! clf;
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149 %! colormap ('default');
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150 %! [c, h] = contourf (peaks (), -7:6);
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151 %! clabel (c, h, -6:2:6, 'fontsize', 12);
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152 %! title ('clabel() labeling every other contour');
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153