Mercurial > hg > octave-nkf

annotate scripts/sparse/colperm.m @ 12575:d0b799dafede

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Grammarcheck files for 3.4.1 release.
author Rik <octave@nomad.inbox5.com>
date Mon, 04 Apr 2011 15:33:46 -0700
parents fd0a3ac60b0e
children 72c96de7a403
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11523
fd0a3ac60b0e update copyright notices
John W. Eaton <jwe@octave.org>
parents: 9245
diff changeset
1 ## Copyright (C) 2004-2011 David Bateman and Andy Adler
5164
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
2 ##
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
3 ## This file is part of Octave.
5164
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
4 ##
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
5 ## Octave is free software; you can redistribute it and/or modify it
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
6 ## under the terms of the GNU General Public License as published by
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
7 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
8 ## your option) any later version.
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
9 ##
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
10 ## Octave is distributed in the hope that it will be useful, but
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
13 ## General Public License for more details.
5164
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
14 ##
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
15 ## You should have received a copy of the GNU General Public License
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
16 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
17 ## <http://www.gnu.org/licenses/>.
5164
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
18
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
19 ## -*- texinfo -*-
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
20 ## @deftypefn {Function File} {@var{p} =} colperm (@var{s})
12575
d0b799dafede Grammarcheck files for 3.4.1 release.
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
21 ## Return the column permutations such that the columns of
5164
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
22 ## @code{@var{s} (:, @var{p})} are ordered in terms of increase number
9051
1bf0ce0930be Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
23 ## of non-zero elements. If @var{s} is symmetric, then @var{p} is chosen
5164
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
24 ## such that @code{@var{s} (@var{p}, @var{p})} orders the rows and
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
25 ## columns with increasing number of non zeros elements.
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
26 ## @end deftypefn
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
27
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
28 function p = colperm (s)
7125
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
29
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
30 if (nargin != 1)
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
31 print_usage ();
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
32 endif
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
33
7505
f5005d9510f4 Remove dispatched sparse functions and treat in the generic versions of the functions
David Bateman <dbateman@free.fr>
parents: 7125
diff changeset
34 [i, j] = find (s);
5164
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
35 idx = find (diff ([j; Inf]) != 0);
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
36 [dummy, p] = sort (idx - [0; idx(1:(end-1))]);
57077d0ddc8e [project @ 2005-02-25 19:55:24 by jwe]
jwe
parents:
diff changeset
37 endfunction