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annotate scripts/signal/sinewave.m @ 14138:72c96de7a403 stable

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maint: update copyright notices for 2012
author John W. Eaton <jwe@octave.org>
date Mon, 02 Jan 2012 14:25:41 -0500
parents 7b90b81a5793
children f3d52523cde1
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14138
72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1995-2012 Andreas Weingessel
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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 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} sinewave (@var{m}, @var{n}, @var{d})
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21 ## Return an @var{m}-element vector with @var{i}-th element given by
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22 ## @code{sin (2 * pi * (@var{i}+@var{d}-1) / @var{n})}.
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23 ##
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24 ## The default value for @var{d} is 0 and the default value for @var{n}
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25 ## is @var{m}.
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26 ## @end deftypefn
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27
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28 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at>
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29 ## Description: Compute a sine wave
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31 function x = sinewave (m, n, d)
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32
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33 if (nargin > 0 && nargin < 4)
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34 if (nargin < 3)
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35 d = 0;
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36 endif
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37 if (nargin < 2)
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38 n = m;
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39 endif
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40 x = sin (((1 : m) + d - 1) * 2 * pi / n);
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41 else
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42 print_usage ();
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43 endif
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44
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45 endfunction
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7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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47 %!assert (sinewave (1), 0);
7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
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48 %!assert (sinewave (1, 4, 1), 1);
7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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49 %!assert (sinewave (1, 12, 1), 1/2, 1e-6);
7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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50 %!assert (sinewave (1, 12, 2), sqrt (3)/2, 1e-6);
7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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51 %!assert (sinewave (1, 20, 1), (sqrt (5)-1)/4, 1e-6);
7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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52 %!assert (sinewave (1), sinewave (1, 1,0));
7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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53 %!assert (sinewave (3, 4), sinewave(3, 4, 0));
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54
7b90b81a5793 codesprint: Wrote 8 tests for sinewave.m
Andriy Shinkarchuck <adriano32.gnu@gmail.com>
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55 %!error sinewave ();