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annotate scripts/plot/appearance/xticks.m @ 26376:00f796120a6d stable

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maint: Update copyright dates in all source files.
author John W. Eaton <jwe@octave.org>
date Wed, 02 Jan 2019 16:32:43 -0500
parents 6652d3823428
children b442ec6dda5c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
26376
00f796120a6d maint: Update copyright dates in all source files.
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2017-2019 Nicholas Jankowski
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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
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8 ## (at 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
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13 ## GNU 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 ## <https://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {} {@var{tickval} =} xticks
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21 ## @deftypefnx {} {@var{mode} =} xticks ("mode")
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22 ## @deftypefnx {} {} xticks (@var{tickval})
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23 ## @deftypefnx {} {} xticks ("auto")
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24 ## @deftypefnx {} {} xticks ("manual")
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25 ## @deftypefnx {} {@dots{} =} xticks (@var{hax}, @dots{})
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26 ## Query or set the tick values on the x-axis of the current axis.
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27 ##
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28 ## When called without an argument, return the current tick locations as
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29 ## specified in the @qcode{"xtick"} axes property. These locations can be
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30 ## changed by calling @code{xticks} with a vector of tick values. Note:
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31 ## ascending order is not required.
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32 ##
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33 ## When called with argument @qcode{"mode"}, @code{xticks} returns the current
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34 ## value of the axes property @qcode{"xtickmode"}. This property can be
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35 ## changed by calling @code{xticks} with either @qcode{"auto"} (algorithm
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36 ## determines tick positions) or @qcode{"manual"} (tick values remain fixed
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37 ## regardless of axes resizing or rotation). Note: Specifying xtick values
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38 ## will also set the property @qcode{"xtickmode"} to @qcode{"manual"}.
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39 ##
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40 ## If the first argument @var{hax} is an axes handle, then operate on
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41 ## this axis rather than the current axes returned by @code{gca}.
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42 ##
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43 ## Requesting a return value when calling @code{xticks} to set a property value
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44 ## will result in an error.
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45 ##
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46 ## @seealso{xticklabels, yticks, zticks, rticks, thetaticks, get, set}
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47 ## @end deftypefn
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48
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49 ## Author: Nicholas Jankowski <jankowskin@asme.org>
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50 ## Created: 2017-08-24
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51
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52 function retval = xticks (varargin)
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53
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54 hax = [];
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55 switch (nargin)
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56 case 0
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57 retval = get (gca, "xtick"); # will error if no xtick exists.
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58 return;
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59
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60 case 1
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61 if (isaxes (varargin{1}))
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62 retval = get (varargin{1}, "xtick");
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63 return;
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64 else
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65 arg = varargin{1};
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66 endif
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67
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68 case 2
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69 if (! isaxes (varargin{1}))
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70 error ("xticks: HAX must be a handle to an axes object");
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71 endif
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72 hax = varargin{1};
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73 arg = varargin{2};
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74
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75 otherwise
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76 print_usage ();
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77
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78 endswitch
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79
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80 if (isempty (hax))
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81 hax = gca ();
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82 endif
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83
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84 if (isnumeric (arg))
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85 if (nargout > 0)
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86 error ("xticks: too many output arguments requested");
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87 endif
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88 ## NOTE: Matlab errors if tick points are not in ascending order. Octave
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89 ## permits out of order tick points, so error is not produced.
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90 set (hax, "xtick", arg);
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91
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92 elseif (ischar (arg))
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93 arg = tolower (arg);
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94 switch (arg)
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95 case "mode"
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96 retval = get (hax, "xtickmode");
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97
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98 case {"auto", "manual"}
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99 if (nargout > 0)
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100 error ("xticks: too many output arguments requested for arg: %s",
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101 arg);
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102 endif
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103 set (hax, "xtickmode", arg);
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104
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105 otherwise
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106 error ("xticks: invalid option: %s", arg);
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107
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108 endswitch
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109
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110 else
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111 print_usage ();
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112 endif
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113
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114 endfunction
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115
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116
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117 %!test
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118 %! hf = figure ("visible", "off");
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119 %! unwind_protect
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120 %! set (gca, "xtickmode", "auto");
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121 %! hax = gca;
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122 %! vals1 = xticks;
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123 %! assert (xticks (hax), vals1);
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124 %! mode1 = xticks ("mode");
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125 %! assert (xticks (hax, "mode"), mode1);
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126 %! xticks (hax, "manual");
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127 %! assert (xticks (hax, "mode"), "manual");
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128 %! xticks (hax, "auto");
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129 %! assert (xticks (hax, "mode"), "auto");
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130 %! xticks (hax, [1 2 3 4]);
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131 %! assert (xticks (hax), [1 2 3 4]);
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132 %! assert (xticks (hax, "mode"), "manual");
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133 %! unwind_protect_cleanup
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134 %! close (hf);
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135 %! end_unwind_protect
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136
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137 ## Test input validation
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138 %!error xticks (1,2,3)
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139 %!test
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140 %! hf = figure ("visible", "off");
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141 %! unwind_protect
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142 %! hax = gca;
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143 %! fail ("xticks (-1, [0 1])", "HAX must be a handle to an axes");
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144 %! fail ("tmp = xticks (hax, [0 1])", "too many output arguments");
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145 %! fail ("tmp = xticks (hax, 'auto')", "too many .* for arg: auto");
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146 %! fail ("tmp = xticks (hax, 'foo')", "invalid option: foo");
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147 %! unwind_protect_cleanup
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148 %! close (hf);
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149 %! end_unwind_protect