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annotate scripts/signal/sinetone.m @ 20305:c164cfc24bdd

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QtHandles: add annotations dialog * libgui/graphics/annotation-dialog.h: new file * libgui/graphics/annotation-dialog.cc: new file * libgui/graphics/annotation-dialog.ui: new file * libgui/graphics/Canvas.cc (canvasMousePressEvent): call annotation_dialog when in TextMode. * libgui/graphics/module.mk: add annotation-dialog to build
author John Donoghue <john.donoghue@ieee.org>
date Sun, 19 Apr 2015 09:54:54 -0400
parents 9fc020886ae9
children f1d0f506ee78
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4197fc428c7d maint: Update copyright notices for 2015.
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1 ## Copyright (C) 1995-2015 Friedrich Leisch
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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} {} sinetone (@var{freq}, @var{rate}, @var{sec}, @var{ampl})
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21 ## Return a sinetone of frequency @var{freq} with length of @var{sec}
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22 ## seconds at sampling rate @var{rate} and with amplitude @var{ampl}.
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23 ## The arguments @var{freq} and @var{ampl} may be vectors of common size.
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24 ##
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25 ## Defaults are @var{rate} = 8000, @var{sec} = 1 and @var{ampl} = 64.
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26 ## @end deftypefn
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28 ## Author: FL <Friedrich.Leisch@ci.tuwien.ac.at>
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29 ## Description: Compute a sine tone
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31 function retval = sinetone (freq, rate = 8000, sec = 1, ampl = 64)
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32
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33 if (nargin < 1 || nargin > 4)
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34 print_usage ();
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35 endif
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36
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37 [err, freq, ampl] = common_size (freq, ampl);
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38 if (err || ! isvector (freq))
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39 error ("sinetone: FREQ and AMPL must be vectors of common size");
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40 endif
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42 if (! (isscalar (rate) && isscalar (sec)))
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43 error ("sinetone: RATE and SEC must be scalars");
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44 endif
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46 n = length (freq);
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47 ns = round (rate * sec);
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48
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49 retval = zeros (ns, n);
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50
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51 for k = 1:n
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52 retval(:, k) = ampl(k) * sin (2 * pi * (1:ns) / rate * freq(k))';
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53 endfor
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55 endfunction
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58 %!assert (size (sinetone (18e6, 150e6, 19550/150e6, 1)), [19550, 1])
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