annotate doc/interpreter/sparseimages.m @ 19627:446c46af4b42 stable

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scripts/signal/module.mk, scripts/sparse/eigs.m, scripts/sparse/pcg.m, scripts/sparse/private/__sprand_impl__.m, scripts/sparse/sprand.m, scripts/sparse/sprandn.m, scripts/sparse/spy.m, scripts/sparse/svds.m, scripts/specfun/expint.m, scripts/specfun/factor.m, scripts/special-matrix/gallery.m, scripts/special-matrix/hankel.m, scripts/special-matrix/toeplitz.m, scripts/startup/inputrc, scripts/statistics/base/kurtosis.m, scripts/statistics/base/moment.m, scripts/statistics/base/qqplot.m, scripts/statistics/base/var.m, scripts/statistics/distributions/betarnd.m, scripts/statistics/distributions/binoinv.m, scripts/statistics/distributions/binopdf.m, scripts/statistics/distributions/binornd.m, scripts/statistics/distributions/cauchy_rnd.m, scripts/statistics/distributions/chi2rnd.m, scripts/statistics/distributions/discrete_pdf.m, scripts/statistics/distributions/discrete_rnd.m, scripts/statistics/distributions/empirical_rnd.m, scripts/statistics/distributions/exprnd.m, scripts/statistics/distributions/frnd.m, scripts/statistics/distributions/gamrnd.m, scripts/statistics/distributions/geornd.m, scripts/statistics/distributions/hygernd.m, scripts/statistics/distributions/kolmogorov_smirnov_cdf.m, scripts/statistics/distributions/laplace_cdf.m, scripts/statistics/distributions/laplace_pdf.m, scripts/statistics/distributions/logistic_cdf.m, scripts/statistics/distributions/logistic_pdf.m, scripts/statistics/distributions/lognrnd.m, scripts/statistics/distributions/nbincdf.m, scripts/statistics/distributions/nbininv.m, scripts/statistics/distributions/nbinpdf.m, scripts/statistics/distributions/nbinrnd.m, scripts/statistics/distributions/normrnd.m, scripts/statistics/distributions/poissinv.m, scripts/statistics/distributions/poissrnd.m, scripts/statistics/distributions/tinv.m, scripts/statistics/distributions/trnd.m, scripts/statistics/distributions/unidcdf.m, scripts/statistics/distributions/unidpdf.m, scripts/statistics/distributions/unidrnd.m, scripts/statistics/distributions/unifrnd.m, scripts/statistics/distributions/wblrnd.m, scripts/statistics/models/module.mk, scripts/statistics/tests/kruskal_wallis_test.m, scripts/strings/base2dec.m, scripts/strings/deblank.m, scripts/strings/dec2base.m, scripts/strings/dec2bin.m, scripts/strings/dec2hex.m, scripts/strings/mat2str.m, scripts/strings/ostrsplit.m, scripts/strings/regexptranslate.m, scripts/strings/str2num.m, scripts/strings/strcat.m, scripts/strings/strjoin.m, scripts/strings/strsplit.m, scripts/strings/strtok.m, scripts/strings/strtrim.m, scripts/strings/strtrunc.m, scripts/strings/substr.m, scripts/testfun/__run_test_suite__.m, scripts/testfun/speed.m, scripts/testfun/test.m, scripts/time/asctime.m, scripts/time/datenum.m, scripts/time/datevec.m, scripts/time/weekday.m, src/Makefile.am, test/Makefile.am, test/build-bc-overload-tests.sh, test/build-sparse-tests.sh, test/jit.tst, test/line-continue.tst: Strip trailing whitespace.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 08:26:57 -0500
parents 3252b366bb5d
children 4197fc428c7d
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d63878346099 maint: Update copyright notices for release.
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1 ## Copyright (C) 2006-2013 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 sparseimages (nm, typ)
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8ac9687dbe9f rename backend to graphics_toolkit
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20 graphics_toolkit ("gnuplot");
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21 set_print_size ();
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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
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26 if (__have_feature__ ("COLAMD")
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27 && __have_feature__ ("CHOLMOD")
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28 && __have_feature__ ("UMFPACK"))
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29 if (strcmp (typ,"txt"))
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30 txtimages (nm, 15, typ);
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31 else
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32 if (strcmp (nm, "gplot"))
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33 gplotimages ("gplot", typ);
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diff changeset
34 elseif (strcmp (nm, "grid"))
11033
d9c8916bb9dd Untabify a few remaining .m scripts.
Rik <octave@nomad.inbox5.com>
parents: 9914
diff changeset
35 femimages ("grid", typ);
6126
c0011bf8f815 [project @ 2006-10-31 20:08:30 by jwe]
jwe
parents: 6040
diff changeset
36 else
11033
d9c8916bb9dd Untabify a few remaining .m scripts.
Rik <octave@nomad.inbox5.com>
parents: 9914
diff changeset
37 otherimages (nm, 200, typ);
6126
c0011bf8f815 [project @ 2006-10-31 20:08:30 by jwe]
jwe
parents: 6040
diff changeset
38 endif
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
39 endif
6040
2bcb2fa24bbf [project @ 2006-10-09 15:13:29 by jwe]
jwe
parents: 6003
diff changeset
40 else ## There is no sparse matrix implementation available because
2bcb2fa24bbf [project @ 2006-10-09 15:13:29 by jwe]
jwe
parents: 6003
diff changeset
41 ## of missing libraries, plot sombreros instead
2bcb2fa24bbf [project @ 2006-10-09 15:13:29 by jwe]
jwe
parents: 6003
diff changeset
42 sombreroimage (nm, typ);
2bcb2fa24bbf [project @ 2006-10-09 15:13:29 by jwe]
jwe
parents: 6003
diff changeset
43 endif
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
44 endfunction
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
45
9912
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
46 function set_print_size ()
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
47 image_size = [5.0, 3.5]; # in inches, 16:9 format
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
48 border = 0; # For postscript use 50/72
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
49 set (0, "defaultfigurepapertype", "<custom>");
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
50 set (0, "defaultfigurepaperorientation", "landscape");
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
51 set (0, "defaultfigurepapersize", image_size + 2*border);
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
52 set (0, "defaultfigurepaperposition", [border, border, image_size]);
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
53 endfunction
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
54
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
55 function hide_output ()
6257
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe]
jwe
parents: 6180
diff changeset
56 f = figure (1);
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe]
jwe
parents: 6180
diff changeset
57 set (f, "visible", "off");
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
58 endfunction
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
59
6040
2bcb2fa24bbf [project @ 2006-10-09 15:13:29 by jwe]
jwe
parents: 6003
diff changeset
60 function gplotimages (nm, typ)
9912
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
61 hide_output ();
9914
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
62 if (strcmp (typ, "eps"))
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
63 d_typ = "-depsc2";
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
64 else
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
65 d_typ = ["-d" typ];
9914
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
66 endif
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
67
6040
2bcb2fa24bbf [project @ 2006-10-09 15:13:29 by jwe]
jwe
parents: 6003
diff changeset
68 A = sparse ([2,6,1,3,2,4,3,5,4,6,1,5],
11033
d9c8916bb9dd Untabify a few remaining .m scripts.
Rik <octave@nomad.inbox5.com>
parents: 9914
diff changeset
69 [1,1,2,2,3,3,4,4,5,5,6,6], 1, 6, 6);
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
70 xy = [0,4,8,6,4,2;5,0,5,7,5,7]';
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
71 gplot (A, xy);
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
72 print ([nm "." typ], d_typ);
9912
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
73 hide_output ();
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
74 endfunction
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
75
17504
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
76 function txtimages (nm, n, typ)
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
77 a = 10*speye (n) + sparse (1:n,ceil([1:n]/2),1,n,n) + ...
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
78 sparse (ceil ([1:n]/2),1:n,1,n,n);
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
79 if (strcmp (nm, "gplot") || strcmp (nm, "grid"))
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
80 fid = fopen (sprintf ("%s.txt", nm), "wt");
7256
be3280acbdb8 [project @ 2007-12-05 01:08:17 by jwe]
jwe
parents: 7018
diff changeset
81 fputs (fid, "\n");
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
82 fputs (fid, "+---------------------------------+\n");
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
83 fputs (fid, "| Image unavailable in text mode. |\n");
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
84 fputs (fid, "+---------------------------------+\n");
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
85 fclose (fid);
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
86 elseif (strcmp (nm, "spmatrix"))
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
87 printsparse (a, ["spmatrix." typ]);
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
88 else
17504
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
89 if (__have_feature__ ("COLAMD") && __have_feature__ ("CHOLMOD"))
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
90 if (strcmp (nm, "spchol"))
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
91 r1 = chol (a);
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
92 printsparse (r1, ["spchol." typ]);
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
93 elseif (strcmp (nm, "spcholperm"))
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
94 [r2,p2,q2] = chol (a);
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
95 printsparse(r2, ["spcholperm." typ]);
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
96 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
97 ## printf("Text NNZ: Matrix %d, Chol %d, PermChol %d\n",nnz(a),nnz(r1),nnz(r2));
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
98 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
99 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
100 endfunction
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
101
17504
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
102 function otherimages (nm, n, typ)
9912
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
103 hide_output ();
9914
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
104 if (strcmp (typ, "eps"))
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
105 d_typ = "-depsc2";
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
106 else
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
107 d_typ = ["-d" typ];
9914
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
108 endif
e76d8c767584 Switch to color output for PostScript documentation images
Rik <rdrider0-list@yahoo.com>
parents: 9912
diff changeset
109
17504
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
110 a = 10*speye (n) + sparse (1:n,ceil([1:n]/2),1,n,n) + ...
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
111 sparse (ceil ([1:n]/2),1:n,1,n,n);
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
112 if (strcmp (nm, "spmatrix"))
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
113 spy (a);
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
114 axis ("ij");
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
115 print (["spmatrix." typ], d_typ);
9912
e9fe12c1b0c0 Set default papersize to the desired imagesize
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
116 hide_output ();
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
117 else
17504
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
118 if (__have_feature__ ("COLAMD") && __have_feature__ ("CHOLMOD"))
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
119 if (strcmp (nm, "spchol"))
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
120 r1 = chol (a);
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
121 spy (r1);
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
122 axis ("ij");
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
123 print (["spchol." typ], d_typ);
11033
d9c8916bb9dd Untabify a few remaining .m scripts.
Rik <octave@nomad.inbox5.com>
parents: 9914
diff changeset
124 hide_output ();
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
125 elseif (strcmp (nm, "spcholperm"))
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
126 [r2,p2,q2] = chol (a);
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
127 spy (r2);
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
128 axis ("ij");
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
129 print (["spcholperm." typ], d_typ);
11033
d9c8916bb9dd Untabify a few remaining .m scripts.
Rik <octave@nomad.inbox5.com>
parents: 9914
diff changeset
130 hide_output ();
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
131 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
132 ## printf("Image NNZ: Matrix %d, Chol %d, PermChol %d\n",nnz(a),nnz(r1),nnz(r2));
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
133 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
134 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
135 endfunction
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
136
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
137 function printsparse (a, nm)
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
138 fid = fopen (nm,"wt");
7256
be3280acbdb8 [project @ 2007-12-05 01:08:17 by jwe]
jwe
parents: 7018
diff changeset
139 fputs (fid, "\n");
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
140 for i = 1:rows (a)
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
141 if (rem (i,5) == 0)
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
142 fprintf (fid," %2d - ", i);
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
143 else
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
144 fprintf (fid," | ");
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
145 endif
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
146 for j = 1:columns (a)
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
147 if (a(i,j) == 0)
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
148 fprintf (fid," ");
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
149 else
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
150 fprintf (fid," *");
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
151 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
152 endfor
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
153 fprintf (fid,"\n");
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
154 endfor
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
155 fprintf (fid," |-");
17504
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
156 for j = 1:columns (a)
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
157 if (rem (j,5) == 0)
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
158 fprintf (fid,"-|");
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
159 else
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
160 fprintf (fid,"--");
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
161 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
162 endfor
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
163 fprintf (fid,"\n");
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
164 fprintf (fid," ");
17504
8b692d9ea54e Use Octave coding conventions for m-files which generate images for manual.
Rik <rik@octave.org>
parents: 16994
diff changeset
165 for j = 1:columns (a)
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
166 if (rem (j,5) == 0)
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
167 fprintf (fid,"%2d",j);
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
168 else
16994
333243133364 Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
Rik <rik@octave.org>
parents: 16170
diff changeset
169 fprintf (fid," ");
6003
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
170 endif
7f8e4f5e2eb7 [project @ 2006-09-26 21:09:31 by jwe]
jwe
parents:
diff changeset
171 endfor
16994
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172 fclose (fid);
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173 endfunction
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174
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175 function femimages (nm, typ)
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176 hide_output ();
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177 if (strcmp (typ, "eps"))
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178 d_typ = "-depsc2";
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179 else
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180 d_typ = ["-d" typ];
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181 endif
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182
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183 if (__have_feature__ ("COLAMD")
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184 && __have_feature__ ("CHOLMOD")
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185 && __have_feature__ ("UMFPACK"))
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186 ## build a rectangle
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187 node_y = [1;1.2;1.5;1.8;2] * ones (1,11);
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188 node_x = ones (5,1) * [1,1.05,1.1,1.2,1.3,1.5,1.7,1.8,1.9,1.95,2];
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189 nodes = [node_x(:), node_y(:)];
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190
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191 [h,w] = size (node_x);
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192 elems = [];
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193 for idx = 1 : w-1
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194 widx = (idx-1)*h;
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195 elems = [elems; widx+[(1:h-1);(2:h);h+(1:h-1)]'];
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196 elems = [elems; widx+[(2:h);h+(2:h);h+(1:h-1)]'];
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197 endfor
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198
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199 E = size (elems,1); # No. of elements
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200 N = size (nodes,1); # No. of elements
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201 D = size (elems,2); # dimensions+1
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202
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203 ## Plot FEM Geometry
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204 elemx = elems(:,[1,2,3,1])';
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205 xelems = reshape (nodes(elemx, 1), 4, E);
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206 yelems = reshape (nodes(elemx, 2), 4, E);
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207
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208 ## Set element conductivity
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209 conductivity = [1*ones(1,16), 2*ones(1,48), 1*ones(1,16)];
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210
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211 ## Dirichlet boundary conditions
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212 D_nodes = [1:5, 51:55];
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213 D_value = [10*ones(1,5), 20*ones(1,5)];
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214
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215 ## Neumann boundary conditions
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216 ## Note that N_value must be normalized by the boundary
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217 ## length and element conductivity
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218 N_nodes = [];
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219 N_value = [];
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220
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221 ## Calculate connectivity matrix
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222 C = sparse ((1:D*E), reshape (elems',D*E,1),1, D*E, N);
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223
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224 ## Calculate stiffness matrix
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225 Siidx = floor ([0:D*E-1]'/D)*D*ones(1,D) + ones(D*E,1)*(1:D);
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226 Sjidx = [1:D*E]'*ones (1,D);
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227 Sdata = zeros (D*E,D);
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228 dfact = prod (2:(D-1));
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229 for j = 1:E
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230 a = inv ([ ones(D,1), nodes( elems(j,:), : ) ]);
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231 const = conductivity(j)*2/dfact/abs (det (a));
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232 Sdata(D*(j-1)+(1:D),:) = const * a(2:D,:)'*a(2:D,:);
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233 endfor
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234
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235 ## Element-wise system matrix
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236 SE = sparse (Siidx,Sjidx,Sdata);
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237 ## Global system matrix
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238 S = C'* SE *C;
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239
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240 ## Set Dirichlet boundary
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241 V = zeros (N,1);
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242 V(D_nodes) = D_value;
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243 idx = 1:N;
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244 idx(D_nodes) = [];
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245
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246 ## Set Neumann boundary
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247 Q = zeros (N,1);
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248 Q(N_nodes) = N_value; # FIXME
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249
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250 V(idx) = S(idx,idx) \ ( Q(idx) - S(idx,D_nodes)*V(D_nodes) );
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251
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252 velems = reshape (V(elemx), 4, E);
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253
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254 plot3 (xelems, yelems, velems);
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3252b366bb5d sparseimages.m: Fix incorrect view() command for printed image.
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diff changeset
255 view (80, 10);
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256 print ([nm "." typ], d_typ);
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257 hide_output ();
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258 endif
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259 endfunction
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260
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261 ## There is no sparse matrix implementation available because of missing
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262 ## libraries, plot sombreros instead. Also plot a nice title that we are
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diff changeset
263 ## sorry about that.
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diff changeset
264 function sombreroimage (nm, typ)
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diff changeset
265 if (strcmp (typ, "txt"))
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266 fid = fopen (sprintf ("%s.txt", nm), "wt");
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267 fputs (fid, "\n");
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diff changeset
268 fputs (fid, "+---------------------------------------+\n");
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269 fputs (fid, "| Image unavailable because of a |\n");
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270 fputs (fid, "| missing sparse matrix implementation. |\n");
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271 fputs (fid, "+---------------------------------------+\n");
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diff changeset
272 fclose (fid);
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diff changeset
273 return;
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diff changeset
274 else ## if (!strcmp (typ, "txt"))
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275
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276 hide_output ();
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277 if (strcmp (typ, "eps"))
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diff changeset
278 d_typ = "-depsc2";
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diff changeset
279 else
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280 d_typ = ["-d" typ];
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diff changeset
281 endif
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282
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diff changeset
283 [x, y, z] = sombrero ();
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diff changeset
284 unwind_protect
6257
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diff changeset
285 mesh (x, y, z);
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diff changeset
286 title ("Sorry, graphics are unavailable because Octave was\ncompiled without a sparse matrix implementation.");
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diff changeset
287 unwind_protect_cleanup
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288 print ([nm "." typ], d_typ);
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289 hide_output ();
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290 end_unwind_protect
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291 endif
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292 endfunction
7262
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293
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294 ## generate something for the texinfo @image command to process
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diff changeset
295 function image_as_txt (nm)
7262
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diff changeset
296 fid = fopen (sprintf ("%s.txt", nm), "wt");
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diff changeset
297 fputs (fid, "\n");
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diff changeset
298 fputs (fid, "+---------------------------------+\n");
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diff changeset
299 fputs (fid, "| Image unavailable in text mode. |\n");
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diff changeset
300 fputs (fid, "+---------------------------------+\n");
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diff changeset
301 fclose (fid);
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diff changeset
302 endfunction
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diff changeset
303