Mercurial > octave
view scripts/signal/sinetone.m @ 33582:de14d508b8f9 default tip @
maint: Merge stable to default.
author | Markus Mützel <markus.muetzel@gmx.de> |
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date | Mon, 13 May 2024 18:40:08 +0200 |
parents | 2e484f9f1f18 |
children |
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######################################################################## ## ## Copyright (C) 1995-2024 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave is free software: you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{y} =} sinetone (@var{freq}, @var{rate}, @var{sec}, @var{ampl}) ## Return a sinetone of frequency @var{freq} with a length of @var{sec} ## seconds at sampling rate @var{rate} and with amplitude @var{ampl}. ## ## The arguments @var{freq} and @var{ampl} may be vectors of common size. ## ## The defaults are @var{rate} = 8000, @var{sec} = 1, and @var{ampl} = 64. ## @seealso{sinewave} ## @end deftypefn function y = sinetone (freq, rate = 8000, sec = 1, ampl = 64) if (nargin < 1) print_usage (); endif [err, freq, ampl] = common_size (freq, ampl); if (err || ! isvector (freq)) error ("sinetone: FREQ and AMPL must be vectors of common size"); endif if (! (isscalar (rate) && isscalar (sec))) error ("sinetone: RATE and SEC must be scalars"); endif n = length (freq); ns = round (rate * sec); y = zeros (ns, n); for k = 1:n y(:, k) = ampl(k) * sin (2 * pi * (1:ns) / rate * freq(k))'; endfor endfunction %!assert (size (sinetone (18e6, 150e6, 19550/150e6, 1)), [19550, 1])