Mercurial > hg > octave-lyh

annotate scripts/signal/sinc.m @ 11188:4cb1522e4d0f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use function handle as input to cellfun, rather than quoted function name or anonymous function wrapper.
author Rik <octave@nomad.inbox5.com>
date Wed, 03 Nov 2010 17:20:56 -0700
parents f0c3d3fc4903
children fd0a3ac60b0e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8920
eb63fbe60fab update copyright notices
John W. Eaton <jwe@octave.org>
parents: 8517
diff changeset
1 ## Copyright (C) 1994, 1996, 1997, 1999, 2000, 2004, 2005, 2007, 2009
7017
a1dbe9d80eee [project @ 2007-10-12 21:27:11 by jwe]
jwe
parents: 7016
diff changeset
2 ## John W. Eaton
2313
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
3 ##
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
4 ## This file is part of Octave.
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
5 ##
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
6 ## Octave is free software; you can redistribute it and/or modify it
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
7 ## under the terms of the GNU General Public License as published by
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 5307
diff changeset
8 ## 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
9 ## your option) any later version.
2313
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
10 ##
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
11 ## Octave is distributed in the hope that it will be useful, but
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
14 ## General Public License for more details.
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
15 ##
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
16 ## 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
17 ## 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
18 ## <http://www.gnu.org/licenses/>.
2303
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 904
diff changeset
19
3367
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
20 ## -*- texinfo -*-
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
21 ## @deftypefn {Function File} {} sinc (@var{x})
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
22 ## Return
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
23 ## @tex
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
24 ## $ \sin (\pi x)/(\pi x)$.
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
25 ## @end tex
8517
81d6ab3ac93c Allow documentation tobe built for other formats than tex and info
sh@sh-laptop
parents: 7125
diff changeset
26 ## @ifnottex
3367
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
27 ## sin(pi*x)/(pi*x).
8517
81d6ab3ac93c Allow documentation tobe built for other formats than tex and info
sh@sh-laptop
parents: 7125
diff changeset
28 ## @end ifnottex
3367
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
29 ## @end deftypefn
559
4e826edfbc56 [project @ 1994-07-25 22:18:28 by jwe]
jwe
parents:
diff changeset
30
3367
0748b03c3510 [project @ 1999-11-20 14:52:38 by jwe]
jwe
parents: 2847
diff changeset
31 ## Author: jwe ???
2314
949ab8eba8bc [project @ 1996-07-12 03:58:02 by jwe]
jwe
parents: 2313
diff changeset
32
2311
2b5788792cad [project @ 1996-07-11 20:18:38 by jwe]
jwe
parents: 2303
diff changeset
33 function result = sinc (x)
559
4e826edfbc56 [project @ 1994-07-25 22:18:28 by jwe]
jwe
parents:
diff changeset
34
7125
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
35 if (nargin != 1)
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
36 print_usage ();
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
37 endif
f084ba47812b [project @ 2007-11-08 02:29:23 by jwe]
jwe
parents: 7017
diff changeset
38
3486
9493fe321888 [project @ 2000-01-28 05:05:41 by jwe]
jwe
parents: 3367
diff changeset
39 result = ones (size (x));
559
4e826edfbc56 [project @ 1994-07-25 22:18:28 by jwe]
jwe
parents:
diff changeset
40
3486
9493fe321888 [project @ 2000-01-28 05:05:41 by jwe]
jwe
parents: 3367
diff changeset
41 i = (x != 0);
559
4e826edfbc56 [project @ 1994-07-25 22:18:28 by jwe]
jwe
parents:
diff changeset
42
4807
15e923b54eff [project @ 2004-03-02 14:21:02 by jwe]
jwe
parents: 3486
diff changeset
43 if (any (i(:)))
3486
9493fe321888 [project @ 2000-01-28 05:05:41 by jwe]
jwe
parents: 3367
diff changeset
44 t = pi * x(i);
9493fe321888 [project @ 2000-01-28 05:05:41 by jwe]
jwe
parents: 3367
diff changeset
45 result(i) = sin (t) ./ t;
559
4e826edfbc56 [project @ 1994-07-25 22:18:28 by jwe]
jwe
parents:
diff changeset
46 endif
4e826edfbc56 [project @ 1994-07-25 22:18:28 by jwe]
jwe
parents:
diff changeset
47
4e826edfbc56 [project @ 1994-07-25 22:18:28 by jwe]
jwe
parents:
diff changeset
48 endfunction