octave-lyh: scripts/signal/bartlett.m annotate

annotate scripts/signal/bartlett.m @ 17478:b8ecdb6ce2f8

assert.m: Speed up function by ~16% by not pre-calculating warning message. * scripts/testfun/assert.m: Don't pre-calculate "in" warning message since it is only used a small fraction of the time when there is an actual error.

author	Rik <rik@octave.org>
date	Mon, 23 Sep 2013 13:43:23 -0700
parents	f3d52523cde1
children

rev	line source
14138 72c96de7a403 maint: update copyright notices for 2012 John W. Eaton <jwe@octave.org> parents: 13279 diff changeset	1 ## Copyright (C) 1995-2012 Andreas Weingessel
3426 f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe] jwe parents: 3191 diff changeset	2 ##
3922 38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe] jwe parents: 3457 diff changeset	3 ## This file is part of Octave.
38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe] jwe parents: 3457 diff changeset	4 ##
38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe] jwe parents: 3457 diff changeset	5 ## Octave is free software; you can redistribute it and/or modify it
38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe] jwe parents: 3457 diff changeset	6 ## 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: 6046 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: 6046 diff changeset	8 ## your option) any later version.
3426 f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe] jwe parents: 3191 diff changeset	9 ##
3922 38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe] jwe parents: 3457 diff changeset	10 ## Octave is distributed in the hope that it will be useful, but
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
3426 f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe] jwe parents: 3191 diff changeset	13 ## General Public License for more details.
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe] jwe parents: 3191 diff changeset	14 ##
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 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: 6046 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: 6046 diff changeset	17 ## <http://www.gnu.org/licenses/>.
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	18
3449 858695b3ed62 [project @ 2000-01-18 04:08:59 by jwe] jwe parents: 3426 diff changeset	19 ## -- texinfo --
858695b3ed62 [project @ 2000-01-18 04:08:59 by jwe] jwe parents: 3426 diff changeset	20 ## @deftypefn {Function File} {} bartlett (@var{m})
858695b3ed62 [project @ 2000-01-18 04:08:59 by jwe] jwe parents: 3426 diff changeset	21 ## Return the filter coefficients of a Bartlett (triangular) window of
858695b3ed62 [project @ 2000-01-18 04:08:59 by jwe] jwe parents: 3426 diff changeset	22 ## length @var{m}.
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	23 ##
9051 1bf0ce0930be Grammar check TexInfo in all .m files Rik <rdrider0-list@yahoo.com> parents: 8920 diff changeset	24 ## For a definition of the Bartlett window, see e.g., A. V. Oppenheim &
8484 895d49a7e36a [docs] "Discrete-Time Signal Processing" => @cite{Discrete-Time Signal Processing} Brian Gough <bjg@gnu.org> parents: 7017 diff changeset	25 ## R. W. Schafer, @cite{Discrete-Time Signal Processing}.
3449 858695b3ed62 [project @ 2000-01-18 04:08:59 by jwe] jwe parents: 3426 diff changeset	26 ## @end deftypefn
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	27
3457 e031284eea27 [project @ 2000-01-19 08:49:56 by jwe] jwe parents: 3449 diff changeset	28 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at>
e031284eea27 [project @ 2000-01-19 08:49:56 by jwe] jwe parents: 3449 diff changeset	29 ## Description: Coefficients of the Bartlett (triangular) window
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	30
e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	31 function c = bartlett (m)
3426 f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe] jwe parents: 3191 diff changeset	32
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	33 if (nargin != 1)
6046 34f96dd5441b [project @ 2006-10-10 16:10:25 by jwe] jwe parents: 5307 diff changeset	34 print_usage ();
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	35 endif
3426 f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe] jwe parents: 3191 diff changeset	36
13279 984359717d71 Use common code idiom for checking whether a double value is an integer. Rik <octave@nomad.inbox5.com> parents: 13062 diff changeset	37 if (! (isscalar (m) && (m == fix (m)) && (m > 0)))
11472 1740012184f9 Use uppercase for variable names in error() strings to match Info documentation. Only m-files done. Rik <octave@nomad.inbox5.com> parents: 9051 diff changeset	38 error ("bartlett: M has to be an integer > 0");
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	39 endif
3426 f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe] jwe parents: 3191 diff changeset	40
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	41 if (m == 1)
e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	42 c = 1;
e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	43 else
e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	44 m = m - 1;
e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	45 n = fix (m / 2);
4172 2e94b2abfe6d [project @ 2002-11-12 21:14:04 by jwe] jwe parents: 4030 diff changeset	46 c = [2(0:n)/m, 2-2(n+1:m)/m]';
3191 e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	47 endif
e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	48
e4f4b2d26ee9 [project @ 1998-10-23 05:43:59 by jwe] jwe parents: diff changeset	49 endfunction
13062 b3a8b75dfec3 codesprint: 9 tests for bartlett.m Andriy Shinkarchuck <adriano32.gnu@gmail.com> parents: 11523 diff changeset	50
14363 f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	51
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	52 %!assert (bartlett (1), 1)
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	53 %!assert (bartlett (2), zeros (2,1))
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	54 %!assert (bartlett (16), fliplr (bartlett (16)))
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	55 %!assert (bartlett (15), fliplr (bartlett (15)))
13062 b3a8b75dfec3 codesprint: 9 tests for bartlett.m Andriy Shinkarchuck <adriano32.gnu@gmail.com> parents: 11523 diff changeset	56 %!test
b3a8b75dfec3 codesprint: 9 tests for bartlett.m Andriy Shinkarchuck <adriano32.gnu@gmail.com> parents: 11523 diff changeset	57 %! N = 9;
b3a8b75dfec3 codesprint: 9 tests for bartlett.m Andriy Shinkarchuck <adriano32.gnu@gmail.com> parents: 11523 diff changeset	58 %! A = bartlett (N);
14363 f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	59 %! assert (A(ceil (N/2)), 1);
13062 b3a8b75dfec3 codesprint: 9 tests for bartlett.m Andriy Shinkarchuck <adriano32.gnu@gmail.com> parents: 11523 diff changeset	60
14363 f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	61 %!error bartlett ()
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	62 %!error bartlett (0.5)
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	63 %!error bartlett (-1)
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	64 %!error bartlett (ones (1,4))
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	65

Mercurial > hg > octave-lyh

annotate scripts/signal/bartlett.m @ 17478:b8ecdb6ce2f8