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update Octave Project Developers copyright for the new year
author John W. Eaton <jwe@octave.org>
date Fri, 06 Jan 2023 13:11:27 -0500
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1 ########################################################################
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2 ##
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3 ## Copyright (C) 1995-2023 The Octave Project Developers
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4 ##
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5 ## See the file COPYRIGHT.md in the top-level directory of this
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6 ## distribution or <https://octave.org/copyright/>.
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7 ##
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8 ## This file is part of Octave.
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9 ##
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10 ## Octave is free software: you can redistribute it and/or modify it
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11 ## under the terms of the GNU General Public License as published by
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12 ## the Free Software Foundation, either version 3 of the License, or
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13 ## (at your option) any later version.
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14 ##
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15 ## Octave is distributed in the hope that it will be useful, but
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16 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ## GNU General Public License for more details.
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19 ##
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20 ## You should have received a copy of the GNU General Public License
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21 ## along with Octave; see the file COPYING. If not, see
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22 ## <https://www.gnu.org/licenses/>.
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23 ##
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24 ########################################################################
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25
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26 ## -*- texinfo -*-
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27 ## @deftypefn {} {@var{retval} =} triangle_sw (@var{n}, @var{b})
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28 ## Triangular spectral window.
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29 ##
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30 ## Subfunction used for spectral density estimation.
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31 ## @seealso{spectral_xdf}
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32 ## @end deftypefn
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33
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34 function retval = triangle_sw (n, b)
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35
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36 retval = zeros (n,1);
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37 retval(1) = 1 / b;
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38
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39 l = (2:n)' - 1;
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40 l = 2 * pi * l / n;
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41
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42 retval(2:n) = b * (sin (l / (2*b)) ./ sin (l / 2)).^2;
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43
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44 endfunction