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fplot.m: Overhaul function for Matlab compatibility and performance (bug #38961). * scripts/plot/fplot.m: Add ability to specify n,tol,fmt in any order and simultaneously. Return data rather than plotting it if asked. Use additional test on progress of algorithm to decide whether to quit. Add %!demo and %!tests.
author Rik <rik@octave.org>
date Thu, 11 Jul 2013 09:25:54 -0700
parents ddac88d32d6a
children b2cbf369837e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 (@var{x}, @var{y}, @var{linespec})
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23 ## @deftypefnx {Function File} {} stem (@dots{}, "filled")
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24 ## @deftypefnx {Function File} {@var{h} =} stem (@dots{})
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25 ## Plot a stem graph from two vectors of x-y data. If only one argument
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26 ## is given, it is taken as the y-values and the x coordinates are taken
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27 ## from the indices of the elements.
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28 ##
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29 ## If @var{y} is a matrix, then each column of the matrix is plotted as
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30 ## a separate stem graph. In this case @var{x} can either be a vector,
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31 ## the same length as the number of rows in @var{y}, or it can be a
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32 ## matrix of the same size as @var{y}.
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33 ##
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34 ## The default color is @code{"b"} (blue). The default line style is
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35 ## @code{"-"} and the default marker is @code{"o"}. The line style can
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36 ## be altered by the @code{linespec} argument in the same manner as the
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37 ## @code{plot} command. For example,
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38 ##
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39 ## @example
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40 ## @group
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41 ## x = 1:10;
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42 ## y = 2*x;
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43 ## stem (x, y, "r");
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44 ## @end group
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45 ## @end example
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46 ##
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47 ## @noindent
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48 ## plots 10 stems with heights from 2 to 20 in red;
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49 ##
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50 ## The optional return value @var{h} is a vector of "stem series" graphics
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51 ## handles with one handle per column of the variable @var{y}. The
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52 ## handle regroups the elements of the stem graph together as the
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53 ## children of the "stem series" handle, allowing them to be altered
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54 ## together. For example,
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55 ##
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56 ## @example
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57 ## @group
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58 ## x = [0:10]';
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59 ## y = [sin(x), cos(x)]
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60 ## h = stem (x, y);
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61 ## set (h(2), "color", "g");
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62 ## set (h(1), "basevalue", -1)
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63 ## @end group
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64 ## @end example
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65 ##
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66 ## @noindent
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67 ## changes the color of the second "stem series" and moves the base line
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68 ## of the first.
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69 ## @seealso{bar, barh, plot}
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70 ## @end deftypefn
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71
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72 ## Author: Michel D. Schmid <michaelschmid@users.sourceforge.net>
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73 ## Adapted-by: jwe
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74
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75 function h = stem (varargin)
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76
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77 if (nargin < 1)
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78 print_usage ();
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79 endif
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80
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81 tmp = __stem__ (false, varargin{:});
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82
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83 if (nargout > 0)
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84 h = tmp;
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85 endif
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86
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87 endfunction
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88
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89
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90 %!demo
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91 %! clf;
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92 %! x = 1:10;
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93 %! stem (x);
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94
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95 %!demo
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96 %! clf;
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97 %! x = 1:10;
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98 %! y = 2*x;
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99 %! stem (x, y);
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100
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101 %!demo
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102 %! clf;
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103 %! x = 1:10;
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104 %! y = 2*x;
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105 %! h = stem (x, y, 'r');
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106
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107 %!demo
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108 %! clf;
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109 %! x = 1:10;
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110 %! y = 2*x;
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111 %! h = stem (x, y, '-.k');
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112
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113 %!demo
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114 %! clf;
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115 %! x = 1:10;
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116 %! y = 2*x;
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117 %! h = stem (x, y, '-.k.');
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118
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119 %!demo
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120 %! clf;
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121 %! x = 1:10;
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122 %! y = 2*x;
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123 %! h = stem (x, y, 'filled');
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124
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125 %!demo
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126 %! clf;
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127 %! x = (0 : 10)';
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128 %! y = [sin(x), cos(x)];
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129 %! h = stem (x, y);
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130 %! set (h(2), 'color', 'g');
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131 %! set (h(1), 'basevalue', -1);
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132
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133 %!demo
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134 %! clf;
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135 %! N = 11;
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136 %! x = 0:(N-1);
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Ben Abbott <bpabbott@mac.com>
parents: 14363
diff changeset
137 %! y = rand (1, N);
92811d110839 Update copies consistent subset of {x,y,z}data to children of the stem hggoup.
Ben Abbott <bpabbott@mac.com>
parents: 14363
diff changeset
138 %! hs = stem (x(1), y(1));
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Ben Abbott <bpabbott@mac.com>
parents: 14363
diff changeset
139 %! set (gca (), 'xlim', [1, N-1], 'ylim', [0, 1]);
92811d110839 Update copies consistent subset of {x,y,z}data to children of the stem hggoup.
Ben Abbott <bpabbott@mac.com>
parents: 14363
diff changeset
140 %! for k=2:N
92811d110839 Update copies consistent subset of {x,y,z}data to children of the stem hggoup.
Ben Abbott <bpabbott@mac.com>
parents: 14363
diff changeset
141 %! set (hs, 'xdata', x(1:k), 'ydata', y(1:k))
92811d110839 Update copies consistent subset of {x,y,z}data to children of the stem hggoup.
Ben Abbott <bpabbott@mac.com>
parents: 14363
diff changeset
142 %! drawnow ();
92811d110839 Update copies consistent subset of {x,y,z}data to children of the stem hggoup.
Ben Abbott <bpabbott@mac.com>
parents: 14363
diff changeset
143 %! pause (0.2);
92811d110839 Update copies consistent subset of {x,y,z}data to children of the stem hggoup.
Ben Abbott <bpabbott@mac.com>
parents: 14363
diff changeset
144 %! end
16828
ddac88d32d6a Make demos in plot m-files compatible with Matlab for running comparison script.
Rik <rik@octave.org>
parents: 16814
diff changeset
145