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annotate doc/interpreter/plotimages.m @ 9914:e76d8c767584

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Switch to color output for PostScript documentation images
author Rik <rdrider0-list@yahoo.com>
date Fri, 04 Dec 2009 10:44:58 -0800
parents e9fe12c1b0c0
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16f53d29049f update copyright notices
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2007, 2008, 2009 John W. Eaton and David Bateman
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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 function plotimages (nm, typ)
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20 set_print_size ();
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21 hide_output ();
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22 if (strcmp (typ, "png"))
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23 set (0, "defaulttextfontname", "*");
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24 endif
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25 if (strcmp (typ, "eps"))
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26 d_typ = "-depsc2";
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27 else
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28 d_typ = cstrcat ("-d", typ);
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29 endif
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30
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31 if (strcmp(typ , "txt"))
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32 image_as_txt(nm);
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33 elseif (strcmp (nm, "plot"))
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34 x = -10:0.1:10;
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35 plot (x, sin (x));
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36 print (cstrcat (nm, ".", typ), d_typ)
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37 elseif (strcmp (nm, "hist"))
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38 rand ("state", 2);
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39 hist (randn (10000, 1), 30);
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40 print (cstrcat (nm, ".", typ), d_typ)
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41 elseif (strcmp (nm, "errorbar"))
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42 rand ("state", 2);
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43 x = 0:0.1:10;
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44 y = sin (x);
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45 yl = 0.1 .* rand (size (x));
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46 yu = 0.1 .* rand (size (x));
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47 errorbar (x, sin (x), yl, yu);
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48 axis ([0, 10, -1.1, 1.1]);
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49 print (cstrcat (nm, ".", typ), d_typ)
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50 elseif (strcmp (nm, "polar"))
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51 polar (0:0.1:10*pi, 0:0.1:10*pi);
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52 print (cstrcat (nm, ".", typ), d_typ)
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53 elseif (strcmp (nm, "mesh"))
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54 tx = ty = linspace (-8, 8, 41)';
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55 [xx, yy] = meshgrid (tx, ty);
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56 r = sqrt (xx .^ 2 + yy .^ 2) + eps;
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57 tz = sin (r) ./ r;
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58 mesh (tx, ty, tz);
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59 print (cstrcat (nm, ".", typ), d_typ)
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60 elseif (strcmp (nm, "plot3"))
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61 t = 0:0.1:10*pi;
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62 r = linspace (0, 1, numel (t));
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63 z = linspace (0, 1, numel (t));
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64 plot3 (r.*sin(t), r.*cos(t), z);
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65 print (cstrcat (nm, ".", typ), d_typ)
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66 elseif (strcmp (nm, "extended"))
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67 x = 0:0.01:3;
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68 plot(x,erf(x));
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69 hold on;
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70 plot(x,x,"r");
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71 axis([0, 3, 0, 1]);
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72 text(0.65, 0.6175, cstrcat('\leftarrow x = {2/\surd\pi {\fontsize{16}',
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73 '\int_{\fontsize{8}0}^{\fontsize{8}x}} e^{-t^2} dt} = 0.6175'))
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74 print (cstrcat (nm, ".", typ), d_typ)
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75 else
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76 error ("unrecognized plot requested");
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77 endif
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78 hide_output ();
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79 endfunction
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80
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81 function set_print_size ()
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82 image_size = [5.0, 3.5]; # in inches, 16:9 format
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83 border = 0; # For postscript use 50/72
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84 set (0, "defaultfigurepapertype", "<custom>");
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85 set (0, "defaultfigurepaperorientation", "landscape");
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86 set (0, "defaultfigurepapersize", image_size + 2*border);
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87 set (0, "defaultfigurepaperposition", [border, border, image_size]);
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88 endfunction
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89
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90 ## Use this function before plotting commands and after every call to
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91 ## print since print() resets output to stdout (unfortunately, gnpulot
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92 ## can't pop output as it can the terminal type).
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93 function hide_output ()
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94 f = figure (1);
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95 set (f, "visible", "off");
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96 endfunction
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97
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98 ## generate something for the texinfo @image command to process
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99 function image_as_txt(nm)
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100 fid = fopen (sprintf ("%s.txt", nm), "wt");
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101 fputs (fid, "\n");
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102 fputs (fid, "+---------------------------------+\n");
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103 fputs (fid, "| Image unavailable in text mode. |\n");
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104 fputs (fid, "+---------------------------------+\n");
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105 fclose (fid);
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106 endfunction