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doc: Expand and edit documentation for memoization (bug #60860)
author Arun Giridhar <arungiridhar@gmail.com>
date Fri, 30 Sep 2022 06:38:59 -0400
parents 796f54d4ddbf
children 597f3ee61a48
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 ########################################################################
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2 ##
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3 ## Copyright (C) 2007-2022 The Octave Project Developers
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4 ##
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5 ## See the file COPYRIGHT.md in the top-level directory of this
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6 ## distribution or <https://octave.org/copyright/>.
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7 ##
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8 ## This file is part of Octave.
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9 ##
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10 ## Octave is free software: you can redistribute it and/or modify it
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11 ## under the terms of the GNU General Public License as published by
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12 ## the Free Software Foundation, either version 3 of the License, or
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13 ## (at your option) any later version.
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14 ##
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15 ## Octave is distributed in the hope that it will be useful, but
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16 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ## GNU General Public License for more details.
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19 ##
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20 ## You should have received a copy of the GNU General Public License
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21 ## along with Octave; see the file COPYING. If not, see
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22 ## <https://www.gnu.org/licenses/>.
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23 ##
bd51beb6205e update formatting of copyright notices
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24 ########################################################################
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25
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26 function plotimages (d, nm, typ)
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27
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28 if (strcmp (typ , "txt"))
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29 image_as_txt (d, nm);
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30 return;
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31 endif
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32
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33 set_graphics_toolkit ();
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34 set_print_size ();
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35 hide_output ();
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36 outfile = fullfile (d, [nm "." typ]);
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37 if (strcmp (typ, "png"))
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38 set (groot, "defaulttextfontname", "*");
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39 endif
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40 if (strcmp (typ, "eps"))
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41 d_typ = "-depsc2";
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42 else
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43 d_typ = ["-d", typ];
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44 endif
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45
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46 if (strcmp (nm, "plot"))
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47 x = -10:0.1:10;
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48 plot (x, sin (x));
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49 xlabel ("x");
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50 ylabel ("sin (x)");
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51 title ("Simple 2-D Plot");
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52 print (outfile, d_typ);
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53 elseif (strcmp (nm, "hist"))
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54 randn ("state", 1);
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55 hist (randn (10000, 1), 30);
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56 xlabel ("Value");
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57 ylabel ("Count");
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58 title ("Histogram of 10,000 normally distributed random numbers");
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59 print (outfile, d_typ);
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60 elseif (strcmp (nm, "errorbar"))
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61 rand ("state", 2);
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62 x = 0:0.1:10;
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63 y = sin (x);
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64 lerr = 0.1 .* rand (size (x));
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65 uerr = 0.1 .* rand (size (x));
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66 errorbar (x, y, lerr, uerr);
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67 axis ([0, 10, -1.1, 1.1]);
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68 xlabel ("x");
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69 ylabel ("sin (x)");
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70 title ("Errorbar plot of sin (x)");
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71 print (outfile, d_typ);
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72 elseif (strcmp (nm, "polar"))
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73 polar (0:0.1:10*pi, 0:0.1:10*pi);
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74 title ("Example polar plot from 0 to 10*pi");
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75 print (outfile, d_typ);
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76 elseif (strcmp (nm, "mesh"))
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77 tx = ty = linspace (-8, 8, 41)';
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78 [xx, yy] = meshgrid (tx, ty);
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79 r = sqrt (xx .^ 2 + yy .^ 2) + eps;
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80 tz = sin (r) ./ r;
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81 mesh (tx, ty, tz);
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82 xlabel ("tx");
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83 ylabel ("ty");
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84 zlabel ("tz");
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85 title ("3-D Sombrero plot");
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86 print (outfile, d_typ);
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87 elseif (strcmp (nm, "plot3"))
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88 t = 0:0.1:10*pi;
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89 r = linspace (0, 1, numel (t));
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90 z = linspace (0, 1, numel (t));
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91 plot3 (r.*sin (t), r.*cos (t), z);
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92 xlabel ("r.*sin (t)");
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93 ylabel ("r.*cos (t)");
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94 zlabel ("z");
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95 title ("plot3 display of 3-D helix");
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96 print (outfile, d_typ);
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97 elseif (strcmp (nm, "extended"))
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98 x = 0:0.01:3;
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99 plot (x, erf (x));
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100 hold on;
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101 plot (x, x, "r");
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102 axis ([0, 3, 0, 1]);
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103 xlabel ("x");
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104 ylabel ("erf (x)");
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105 title ("erf (x) with text annotation");
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106 if (strcmp (typ, "pdf") && ! strcmp (graphics_toolkit, "gnuplot"))
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107 text (0.65, 0.6175, ['$\displaystyle\leftarrow x = {2\over\sqrt{\pi}}'...
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108 '\int_{0}^{x}e^{-t^2} dt = 0.6175$'],
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109 "interpreter", "latex");
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110 ## Be very careful about modifying this. pdflatex expects to be in
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111 ## the same directory as the file it is operating on.
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112 cd (make_absolute_filename (d));
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113 print ([nm ".pdf"], "-dpdflatexstandalone");
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114 [status, output] = system (["pdflatex " nm]);
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115 if (status)
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116 error ("plotimages: Failed to run pdflatex on <extended.pdf>");
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117 endif
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118 delete ([nm ".aux"], [nm "-inc.pdf"], [nm ".log"], [nm ".tex"]);
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119 else
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120 text (0.65, 0.6175, ['\leftarrow x = {2/\surd\pi {\fontsize{16}' ...
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121 '\int_{\fontsize{8}0}^{\fontsize{8}x}} e^{-t^2} dt} = 0.6175']);
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122 print (outfile, d_typ);
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123 endif
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124 elseif (strcmp (nm, "precisiondate"))
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125 rand ("state", 1);
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126 t = datenum (2020, 1, 1):(1/1440):datenum (2020, 1, 2);
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127 x = -cos (2*pi*t) + rand (size (t)) / 10;
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128 subplot (1, 2, 1);
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129 plot (t, x);
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130 datetick ("x");
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diff changeset
131 xlabel ("serial date");
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
132 title ("problem");
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
133 subplot (1, 2, 2);
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
134 plot (t - 730485, x);
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
135 datetick ("x");
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
136 xlabel ("2000 years off");
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
137 title ("workaround");
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
138 # set wider aspect ratio
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
139 image_size = [8.25, 3.5]; # in inches, 5:2 format
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
140 border = 0; # For postscript use 50/72
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
141 set (gcf, "papersize", image_size + 2*border);
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
142 set (gcf, "paperposition", [border, border, image_size]);
75ba68c686ab doc: Document single precision issues with OpenGL graphics toolkits (bug #59418).
Markus Mützel <markus.muetzel@gmx.de>
parents: 29358
diff changeset
143 print (outfile, d_typ);
6888
b3d286e8a243 [project @ 2007-09-12 06:40:58 by jwe]
jwe
parents:
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144 else
b3d286e8a243 [project @ 2007-09-12 06:40:58 by jwe]
jwe
parents:
diff changeset
145 error ("unrecognized plot requested");
b3d286e8a243 [project @ 2007-09-12 06:40:58 by jwe]
jwe
parents:
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146 endif
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parents: 8920
diff changeset
147 hide_output ();
6888
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148 endfunction
b3d286e8a243 [project @ 2007-09-12 06:40:58 by jwe]
jwe
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149
20335
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Rik <rik@octave.org>
parents: 20322
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150 ## This function no longer sets the graphics toolkit; That is now done
b439ccc9a162 doc: Improve building of images for the Manual.
Rik <rik@octave.org>
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151 ## automatically by C++ code which will ordinarily choose 'qt', but might
b439ccc9a162 doc: Improve building of images for the Manual.
Rik <rik@octave.org>
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152 ## choose gnuplot on older systems. Only a complete lack of plotting is a
b439ccc9a162 doc: Improve building of images for the Manual.
Rik <rik@octave.org>
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diff changeset
153 ## problem.
20322
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Rik <rik@octave.org>
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diff changeset
154 function set_graphics_toolkit ()
20335
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Rik <rik@octave.org>
parents: 20322
diff changeset
155 if (isempty (available_graphics_toolkits ()))
b439ccc9a162 doc: Improve building of images for the Manual.
Rik <rik@octave.org>
parents: 20322
diff changeset
156 error ("no graphics toolkit available for plotting");
24798
45470049a43f Allow getframe and print to work without osmesa (bug #53186).
Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 24534
diff changeset
157 elseif (strcmp ("qt", graphics_toolkit ())
25428
2b3c3c8c8360 Properly test Qt offscreen printing during manual figures generation.
Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 25054
diff changeset
158 && __have_feature__ ("QT_OFFSCREEN"))
24798
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Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 24534
diff changeset
159 ## Use qt with QOffscreenSurface for plot
27847
56d94f86a659 Don't test presence of OSMESA which will always fail (bug #57424)
Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 26376
diff changeset
160 elseif (! strcmp ("gnuplot", graphics_toolkit ()))
20885
e5f78891ad9e Allow doc's images to be generated using gnuplot when osmesa isn't available.
Ben Abbott <bpabbott@mac.com>
parents: 20715
diff changeset
161 if (! any (strcmp ("gnuplot", available_graphics_toolkits ())))
e5f78891ad9e Allow doc's images to be generated using gnuplot when osmesa isn't available.
Ben Abbott <bpabbott@mac.com>
parents: 20715
diff changeset
162 error ("no graphics toolkit available for offscreen plotting");
e5f78891ad9e Allow doc's images to be generated using gnuplot when osmesa isn't available.
Ben Abbott <bpabbott@mac.com>
parents: 20715
diff changeset
163 else
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Ben Abbott <bpabbott@mac.com>
parents: 20715
diff changeset
164 graphics_toolkit ("gnuplot");
e5f78891ad9e Allow doc's images to be generated using gnuplot when osmesa isn't available.
Ben Abbott <bpabbott@mac.com>
parents: 20715
diff changeset
165 endif
20322
03c88436ad8c Correctly generate figure 15.7 of the Manual.
Rik <rik@octave.org>
parents: 20321
diff changeset
166 endif
03c88436ad8c Correctly generate figure 15.7 of the Manual.
Rik <rik@octave.org>
parents: 20321
diff changeset
167 endfunction
03c88436ad8c Correctly generate figure 15.7 of the Manual.
Rik <rik@octave.org>
parents: 20321
diff changeset
168
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diff changeset
169 function set_print_size ()
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diff changeset
170 image_size = [5.0, 3.5]; # in inches, 16:9 format
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Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
171 border = 0; # For postscript use 50/72
24462
8ff3c13d14c1 groot.m: New function to return handle of graphics root object.
Rik <rik@octave.org>
parents: 23903
diff changeset
172 set (groot, "defaultfigurepapertype", "<custom>");
8ff3c13d14c1 groot.m: New function to return handle of graphics root object.
Rik <rik@octave.org>
parents: 23903
diff changeset
173 set (groot, "defaultfigurepaperorientation", "landscape");
8ff3c13d14c1 groot.m: New function to return handle of graphics root object.
Rik <rik@octave.org>
parents: 23903
diff changeset
174 set (groot, "defaultfigurepapersize", image_size + 2*border);
8ff3c13d14c1 groot.m: New function to return handle of graphics root object.
Rik <rik@octave.org>
parents: 23903
diff changeset
175 set (groot, "defaultfigurepaperposition", [border, border, image_size]);
9088
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Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
176 endfunction
77e71f3da3d6 Fix documentation image printing under new development code
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
177
20322
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Rik <rik@octave.org>
parents: 20321
diff changeset
178 ## Use this function before plotting commands and after every call to print
03c88436ad8c Correctly generate figure 15.7 of the Manual.
Rik <rik@octave.org>
parents: 20321
diff changeset
179 ## since print() resets output to stdout (unfortunately, gnuplot can't pop
03c88436ad8c Correctly generate figure 15.7 of the Manual.
Rik <rik@octave.org>
parents: 20321
diff changeset
180 ## output as it can the terminal type).
9088
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Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
181 function hide_output ()
20322
03c88436ad8c Correctly generate figure 15.7 of the Manual.
Rik <rik@octave.org>
parents: 20321
diff changeset
182 hf = figure (1, "visible", "off");
6888
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jwe
parents:
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183 endfunction
7256
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jwe
parents: 7189
diff changeset
184
be3280acbdb8 [project @ 2007-12-05 01:08:17 by jwe]
jwe
parents: 7189
diff changeset
185 ## generate something for the texinfo @image command to process
20315
b9d4ccf4291c Use FLTK for creating plots for Manual.
Michael D. Godfrey <michaeldgodfrey@gmail.com>
parents: 20307
diff changeset
186 function image_as_txt (d, nm)
20316
d8992a16643c doc: Clean up m-files which generate images for Manual.
Rik <rik@octave.org>
parents: 20315
diff changeset
187 fid = fopen (fullfile (d, [nm ".txt"]), "wt");
7256
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parents: 7189
diff changeset
188 fputs (fid, "\n");
be3280acbdb8 [project @ 2007-12-05 01:08:17 by jwe]
jwe
parents: 7189
diff changeset
189 fputs (fid, "+---------------------------------+\n");
be3280acbdb8 [project @ 2007-12-05 01:08:17 by jwe]
jwe
parents: 7189
diff changeset
190 fputs (fid, "| Image unavailable in text mode. |\n");
be3280acbdb8 [project @ 2007-12-05 01:08:17 by jwe]
jwe
parents: 7189
diff changeset
191 fputs (fid, "+---------------------------------+\n");
be3280acbdb8 [project @ 2007-12-05 01:08:17 by jwe]
jwe
parents: 7189
diff changeset
192 fclose (fid);
be3280acbdb8 [project @ 2007-12-05 01:08:17 by jwe]
jwe
parents: 7189
diff changeset
193 endfunction