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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2020.
author John W. Eaton <jwe@octave.org>
date Mon, 06 Jan 2020 22:29:51 -0500
parents b442ec6dda5c
children bd51beb6205e
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27919
1891570abac8 update Octave Project Developers copyright for the new year
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1 ## Copyright (C) 2008-2020 The Octave Project Developers
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2 ##
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3 ## See the file COPYRIGHT.md in the top-level directory of this distribution
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4 ## or <https://octave.org/COPYRIGHT.html/>.
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5 ##
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6 ##
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7 ## This file is part of Octave.
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8 ##
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9 ## Octave is free software: you can redistribute it and/or modify it
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10 ## under the terms of the GNU General Public License as published by
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11 ## the Free Software Foundation, either version 3 of the License, or
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12 ## (at your option) any later version.
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13 ##
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14 ## Octave is distributed in the hope that it will be useful, but
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15 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 ## GNU General Public License for more details.
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18 ##
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19 ## You should have received a copy of the GNU General Public License
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20 ## along with Octave; see the file COPYING. If not, see
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21 ## <https://www.gnu.org/licenses/>.
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22
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23 ## -*- texinfo -*-
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24 ## @deftypefn {} {} clabel (@var{c}, @var{h})
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25 ## @deftypefnx {} {} clabel (@var{c}, @var{h}, @var{v})
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26 ## @deftypefnx {} {} clabel (@var{c}, @var{h}, "manual")
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27 ## @deftypefnx {} {} clabel (@var{c})
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28 ## @deftypefnx {} {} clabel (@dots{}, @var{prop}, @var{val}, @dots{})
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29 ## @deftypefnx {} {@var{h} =} clabel (@dots{})
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30 ## Add labels to the contours of a contour plot.
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31 ##
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32 ## The contour levels are specified by the contour matrix @var{c} which is
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33 ## returned by @code{contour}, @code{contourc}, @code{contourf}, and
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34 ## @code{contour3}. Contour labels are rotated to match the local line
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35 ## orientation and centered on the line. The position of labels along the
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36 ## contour line is chosen randomly.
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37 ##
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38 ## If the argument @var{h} is a handle to a contour group object, then label
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39 ## this plot rather than the one in the current axes returned by @code{gca}.
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40 ##
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41 ## By default, all contours are labeled. However, the contours to label can be
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42 ## specified by the vector @var{v}. If the @qcode{"manual"} argument is
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43 ## given then the contours to label can be selected with the mouse.
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44 ##
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45 ## Additional property/value pairs that are valid properties of text objects
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46 ## can be given and are passed to the underlying text objects. Moreover,
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47 ## the contour group property @qcode{"LabelSpacing"} is available which
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48 ## determines the spacing between labels on a contour to be specified. The
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49 ## default is 144 points, or 2 inches.
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50 ##
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51 ## The optional return value @var{h} is a vector of graphics handles to
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52 ## the text objects representing each label.
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53 ## The @qcode{"userdata"} property of the text objects contains the numerical
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54 ## value of the contour label.
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55 ##
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56 ## An example of the use of @code{clabel} is
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57 ##
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58 ## @example
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59 ## @group
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60 ## [c, h] = contour (peaks (), -4 : 6);
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61 ## clabel (c, h, -4:2:6, "fontsize", 12);
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62 ## @end group
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63 ## @end example
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64 ##
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65 ## @seealso{contour, contourf, contour3, meshc, surfc, text}
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66 ## @end deftypefn
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67
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68 function h = clabel (c, varargin)
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69
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70 have_hg = false;
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71 have_labelspacing = false;
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72 label_spacing = 144; # 2 inches in points
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73
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74 if (nargin < 1)
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75 print_usage ();
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76 elseif (nargin == 1)
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77 hparent = gca ();
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78 else
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79 arg = varargin{1};
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80 if (isscalar (arg) && isgraphics (arg, "hggroup"))
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81 try
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82 get (arg, "contourmatrix");
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83 catch
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84 error ("clabel: H must be a handle to a contour group");
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85 end_try_catch
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86 have_hg = true;
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87 hg = arg;
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88 varargin(1) = [];
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89 else
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90 hparent = gca ();
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91 endif
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92 endif
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93
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94 if (length (varargin) > 0 && isnumeric (varargin{1}))
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95 v = varargin{1}(:);
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96 varargin(1) = [];
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97 else
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98 v = [];
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99 endif
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100
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101 idx = strcmpi (varargin(1:2:end), "manual");
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102 if (any (idx))
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103 error ('clabel: "manual" contour mode is not supported');
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104 endif
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105
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106 idx = find (strcmpi (varargin(1:2:end), "labelspacing"), 1);
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107 if (! isempty (idx))
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108 have_labelspacing = true;
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109 label_spacing = varargin{2*idx};
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110 varargin(2*idx+(-1:0)) = [];
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111 endif
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112
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113 if (have_hg)
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114 if (! isempty (v))
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115 if (have_labelspacing)
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116 set (hg, "textlistmode", "manual", "textlist", v,
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117 "labelspacing", label_spacing, "showtext", "on");
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118 else
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119 set (hg, "textlistmode", "manual", "textlist", v, "showtext", "on");
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120 endif
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121 else
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122 if (have_labelspacing)
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123 set (hg, "showtext", "on", "labelspacing", label_spacing);
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124 else
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125 set (hg, "showtext", "on");
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126 endif
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127 endif
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128 htmp = findobj (hg, "type", "text");
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129 if (! isempty (varargin))
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130 set (htmp, varargin{:});
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131 endif
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132 else
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133 htmp = __clabel__ (c, v, hparent, label_spacing, [], varargin{:});
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134 endif
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135
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136 if (nargout > 0)
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137 h = htmp;
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138 endif
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139
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140 endfunction
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141
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142
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143 %!demo
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144 %! clf;
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Rik <rik@octave.org>
parents: 20852
diff changeset
145 %! colormap ("default");
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
146 %! [c, h] = contour (peaks (), -4:6);
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Rik <rik@octave.org>
parents: 20852
diff changeset
147 %! clabel (c, h, -4:2:6, "fontsize", 12);
1c4cd12987f5 Use Octave syntax in graphics demos.
Rik <rik@octave.org>
parents: 20852
diff changeset
148 %! title ("clabel() labeling every other contour");
14001
5f0bb45e615c doc: Update documentation for functions returning a graphics handle h (Bug #34761)
Rik <octave@nomad.inbox5.com>
parents: 12575
diff changeset
149
5f0bb45e615c doc: Update documentation for functions returning a graphics handle h (Bug #34761)
Rik <octave@nomad.inbox5.com>
parents: 12575
diff changeset
150 %!demo
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Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
151 %! clf;
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1c4cd12987f5 Use Octave syntax in graphics demos.
Rik <rik@octave.org>
parents: 20852
diff changeset
152 %! colormap ("default");
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
153 %! [c, h] = contourf (peaks (), -7:6);
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Rik <rik@octave.org>
parents: 20852
diff changeset
154 %! clabel (c, h, -6:2:6, "fontsize", 12);
1c4cd12987f5 Use Octave syntax in graphics demos.
Rik <rik@octave.org>
parents: 20852
diff changeset
155 %! title ("clabel() labeling every other contour");