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doc: Clarify description of plot format. * scripts/plot/plot.m: Clarify description of plot format.
author Rik <rik@octave.org>
date Tue, 06 Aug 2013 21:23:38 -0700
parents eaab03308c0b
children bc924baa2c4e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 2006-2012 Michel D. Schmid
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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} {} stem (@var{y})
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21 ## @deftypefnx {Function File} {} stem (@var{x}, @var{y})
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22 ## @deftypefnx {Function File} {} stem (@dots{}, @var{linespec})
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23 ## @deftypefnx {Function File} {} stem (@dots{}, "filled")
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24 ## @deftypefnx {Function File} {} stem (@dots{}, @var{prop}, @var{val}, @dots{})
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25 ## @deftypefnx {Function File} {} stem (@var{hax}, @dots{})
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26 ## @deftypefnx {Function File} {@var{h} =} stem (@dots{})
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27 ## Plot a 2-D stem graph.
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28 ##
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29 ## If only one argument is given, it is taken as the y-values and the
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30 ## x-coordinates are taken from the indices of the elements.
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31 ##
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32 ## If @var{y} is a matrix, then each column of the matrix is plotted as
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33 ## a separate stem graph. In this case @var{x} can either be a vector,
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34 ## the same length as the number of rows in @var{y}, or it can be a
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35 ## matrix of the same size as @var{y}.
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36 ##
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37 ## The default color is @code{"b"} (blue), the default line style is
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38 ## @code{"-"}, and the default marker is @code{"o"}. The line style can
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39 ## be altered by the @code{linespec} argument in the same manner as the
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40 ## @code{plot} command. If the "filled" argument is present the markers at
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41 ## the top of the stems will be filled in. For example,
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42 ##
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43 ## @example
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44 ## @group
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45 ## x = 1:10;
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46 ## y = 2*x;
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47 ## stem (x, y, "r");
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48 ## @end group
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49 ## @end example
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50 ##
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51 ## @noindent
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52 ## plots 10 stems with heights from 2 to 20 in red;
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53 ##
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54 ## Optional property/value pairs may be specified to control the appearance
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55 ## of the plot.
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56 ##
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57 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
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58 ## rather than the current axes returned by @code{gca}.
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59 ##
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60 ## The optional return value @var{h} is a vector of "stem series" graphics
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61 ## handles with one handle per column of the variable @var{y}. The
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62 ## handle regroups the elements of the stem graph together as the
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63 ## children of the "stem series" handle, allowing them to be altered
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64 ## together. For example,
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65 ##
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66 ## @example
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67 ## @group
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68 ## x = [0:10]';
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69 ## y = [sin(x), cos(x)]
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70 ## h = stem (x, y);
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71 ## set (h(2), "color", "g");
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72 ## set (h(1), "basevalue", -1)
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73 ## @end group
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74 ## @end example
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75 ##
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76 ## @noindent
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77 ## changes the color of the second "stem series" and moves the base line
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78 ## of the first.
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79 ## @seealso{stem3, bar, hist, plot, stairs}
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80 ## @end deftypefn
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81
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82 ## Author: Michel D. Schmid <michaelschmid@users.sourceforge.net>
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83 ## Adapted-by: jwe
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84
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85 function h = stem (varargin)
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86
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87 if (nargin < 1)
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88 print_usage ();
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89 endif
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90
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91 htmp = __stem__ (false, varargin{:});
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92
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93 if (nargout > 0)
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94 h = htmp;
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95 endif
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96
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97 endfunction
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98
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99
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100 %!demo
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101 %! clf;
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102 %! x = 1:10;
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103 %! stem (x);
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104
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105 %!demo
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106 %! clf;
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107 %! x = 1:10;
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108 %! y = 2*x;
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109 %! stem (x, y);
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110
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111 %!demo
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112 %! clf;
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113 %! x = 1:10;
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114 %! y = 2*x;
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115 %! h = stem (x, y, 'r');
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116
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117 %!demo
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118 %! clf;
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119 %! x = 1:10;
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120 %! y = 2*x;
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121 %! h = stem (x, y, '-.k');
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122
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123 %!demo
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124 %! clf;
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125 %! x = 1:10;
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126 %! y = 2*x;
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127 %! h = stem (x, y, '-.k.');
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128
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129 %!demo
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130 %! clf;
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131 %! x = 1:10;
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132 %! y = 2*x;
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133 %! h = stem (x, y, 'filled');
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134
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135 %!demo
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136 %! clf;
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137 %! x = (0 : 10)';
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David Bateman <dbateman@free.fr>
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138 %! y = [sin(x), cos(x)];
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139 %! h = stem (x, y);
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140 %! set (h(2), 'color', 'g');
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141 %! set (h(1), 'basevalue', -1);
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142
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Ben Abbott <bpabbott@mac.com>
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143 %!demo
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Ben Abbott <bpabbott@mac.com>
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144 %! clf;
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Ben Abbott <bpabbott@mac.com>
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145 %! N = 11;
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Ben Abbott <bpabbott@mac.com>
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146 %! x = 0:(N-1);
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147 %! y = rand (1, N);
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148 %! hs = stem (x(1), y(1));
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149 %! set (gca (), 'xlim', [1, N-1], 'ylim', [0, 1]);
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150 %! for k=2:N
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151 %! set (hs, 'xdata', x(1:k), 'ydata', y(1:k))
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Ben Abbott <bpabbott@mac.com>
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152 %! drawnow ();
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Ben Abbott <bpabbott@mac.com>
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153 %! pause (0.2);
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154 %! end
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155