Mercurial > hg > octave-lyh
annotate scripts/signal/sinewave.m @ 16394:a53f56e16627
doc: Update texinfo @detailmenu to include Java chapter.
* doc/interpreter/octave.texi: Update texinfo @detailmenu to include Java
chapter.
author | Rik <rik@octave.org> |
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date | Fri, 29 Mar 2013 12:14:52 -0700 |
parents | f3d52523cde1 |
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maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1995-2012 Andreas Weingessel |
3426 | 2 ## |
3922 | 3 ## This file is part of Octave. |
4 ## | |
5 ## Octave is free software; you can redistribute it and/or modify it | |
6 ## under the terms of the GNU General Public License as published by | |
7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
8 ## your option) any later version. | |
3426 | 9 ## |
3922 | 10 ## Octave is distributed in the hope that it will be useful, but |
3191 | 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3426 | 13 ## General Public License for more details. |
14 ## | |
3191 | 15 ## You should have received a copy of the GNU General Public License |
7016 | 16 ## along with Octave; see the file COPYING. If not, see |
17 ## <http://www.gnu.org/licenses/>. | |
3191 | 18 |
3449 | 19 ## -*- texinfo -*- |
20 ## @deftypefn {Function File} {} sinewave (@var{m}, @var{n}, @var{d}) | |
21 ## Return an @var{m}-element vector with @var{i}-th element given by | |
22 ## @code{sin (2 * pi * (@var{i}+@var{d}-1) / @var{n})}. | |
3191 | 23 ## |
4834 | 24 ## The default value for @var{d} is 0 and the default value for @var{n} |
25 ## is @var{m}. | |
3449 | 26 ## @end deftypefn |
3191 | 27 |
3457 | 28 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at> |
29 ## Description: Compute a sine wave | |
3191 | 30 |
31 function x = sinewave (m, n, d) | |
3426 | 32 |
4834 | 33 if (nargin > 0 && nargin < 4) |
34 if (nargin < 3) | |
35 d = 0; | |
36 endif | |
37 if (nargin < 2) | |
38 n = m; | |
39 endif | |
40 x = sin (((1 : m) + d - 1) * 2 * pi / n); | |
41 else | |
6046 | 42 print_usage (); |
3191 | 43 endif |
44 | |
45 endfunction | |
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Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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46 |
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47 |
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48 %!assert (sinewave (1), 0) |
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49 %!assert (sinewave (1, 4, 1), 1) |
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50 %!assert (sinewave (1, 12, 1), 1/2, 1e-6) |
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51 %!assert (sinewave (1, 12, 2), sqrt (3)/2, 1e-6) |
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Rik <octave@nomad.inbox5.com>
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52 %!assert (sinewave (1, 20, 1), (sqrt (5)-1)/4, 1e-6) |
f3d52523cde1
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Rik <octave@nomad.inbox5.com>
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53 %!assert (sinewave (1), sinewave (1, 1,0)) |
f3d52523cde1
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Rik <octave@nomad.inbox5.com>
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54 %!assert (sinewave (3, 4), sinewave (3, 4, 0)) |
f3d52523cde1
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Rik <octave@nomad.inbox5.com>
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55 |
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56 %!error sinewave () |
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57 |