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annotate scripts/plot/grid.m @ 17520:8a303b01cdd0

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grid.m: 'grid on' now also turns on minor grid for log scale axes. * scripts/plot/grid.m: When switching grid on, turn minor grid on for log scale axes.
author Rik <rik@octave.org>
date Mon, 30 Sep 2013 19:55:51 -0700
parents bc924baa2c4e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1993-2012 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 {Command} {} grid
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21 ## @deftypefnx {Command} {} grid on
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22 ## @deftypefnx {Command} {} grid off
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23 ## @deftypefnx {Command} {} grid minor
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24 ## @deftypefnx {Command} {} grid minor on
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25 ## @deftypefnx {Command} {} grid minor off
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Ben Abbott <bpabbott@mac.com>
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26 ## @deftypefnx {Function File} {} grid (@var{hax}, @dots{})
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27 ## Control the display of plot grid lines.
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28 ##
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29 ## The function state input may be either @qcode{"on"} or @qcode{"off"}.
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30 ## If it is omitted, the current grid state is toggled.
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31 ##
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32 ## When the first argument is @qcode{"minor"} all subsequent commands
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33 ## modify the minor grid rather than the major grid.
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34 ##
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35 ## If the first argument @var{hax} is an axes handle, then operate on
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36 ## this axis rather than the current axes returned by @code{gca}.
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37 ##
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38 ## To control the grid lines for an individual axis use the @code{set}
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39 ## function. For example:
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40 ##
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41 ## @example
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42 ## set (gca, "ygrid", "on");
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43 ## @end example
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44 ## @seealso{axis, box}
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45 ## @end deftypefn
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46
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47 ## Author: jwe
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48
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49 function grid (varargin)
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50
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51 [hax, varargin, nargs] = __plt_get_axis_arg__ ("grid", varargin{:});
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52
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53 if (isempty (hax))
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54 hax = gca ();
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55 endif
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56
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57 if (nargs > 2)
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58 print_usage ();
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59 endif
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60
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61 grid_on = ( strcmp (get (hax, "xgrid"), "on")
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62 && strcmp (get (hax, "ygrid"), "on")
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63 && strcmp (get (hax, "zgrid"), "on"));
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64
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65 minor_on = ( strcmp (get (hax, "xminorgrid"), "on")
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66 && strcmp (get (hax, "yminorgrid"), "on")
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67 && strcmp (get (hax, "zminorgrid"), "on"));
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68
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69 minor_auto = true;
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70 if (nargs == 0)
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71 grid_on = ! grid_on;
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72 else
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73 arg1 = varargin{1};
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74 if (! ischar (arg1))
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75 error ("grid: argument 1 must be an axis handle or a string");
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76 endif
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77 if (strcmpi (arg1, "off"))
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78 grid_on = false;
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79 elseif (strcmpi (arg1, "on"))
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80 grid_on = true;
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81 elseif (strcmpi (arg1, "minor"))
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82 minor_auto = false;
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83 if (nargs == 2)
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84 arg2 = varargin{2};
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85 if (strcmpi (arg2, "on"))
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86 minor_on = true;
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87 grid_on = true;
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88 elseif (strcmpi (arg2, "off"))
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89 minor_on = false;
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90 else
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91 print_usage ();
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92 endif
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93 else
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94 minor_on = ! minor_on;
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95 if (minor_on)
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96 grid_on = true;
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97 endif
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98 endif
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99 else
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100 print_usage ();
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101 endif
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102 endif
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103
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104 if (grid_on)
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105 set (hax, "xgrid", "on", "ygrid", "on", "zgrid", "on");
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106 if (minor_on)
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107 set (hax, "xminorgrid", "on", "yminorgrid", "on", "zminorgrid", "on");
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108 elseif (minor_auto)
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109 xmg = ifelse (strcmp (get (hax, "xscale"), "log"), "on", "off");
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110 ymg = ifelse (strcmp (get (hax, "yscale"), "log"), "on", "off");
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111 zmg = ifelse (strcmp (get (hax, "zscale"), "log"), "on", "off");
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112 set (hax, "xminorgrid", xmg, "yminorgrid", ymg, "zminorgrid", zmg);
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113 else
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114 set (hax, "xminorgrid", "off", "yminorgrid", "off", "zminorgrid", "off");
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115 endif
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116 else
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117 set (hax, "xgrid", "off", "ygrid", "off", "zgrid", "off",
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118 "xminorgrid", "off", "yminorgrid", "off", "zminorgrid", "off");
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119 endif
b111ca4715c6 [project @ 2005-02-21 19:41:23 by jwe]
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120
4
b4df021f796c [project @ 1993-08-08 01:26:08 by jwe]
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121 endfunction
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122
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123
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124 %!demo
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125 %! clf;
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126 %! subplot (2,2,1);
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127 %! plot (1:100);
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128 %! grid off;
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129 %! title ('no grid');
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130 %! subplot (2,2,2);
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131 %! plot (1:100);
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132 %! grid on;
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133 %! title ('grid on');
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134 %! subplot (2,2,3);
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135 %! plot (1:100);
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136 %! grid minor;
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137 %! title ('grid minor');
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138 %! subplot (2,2,4);
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139 %! semilogy (1:100);
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140 %! grid minor;
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141 %! title ('grid minor');
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142