Mercurial > octave
view scripts/signal/spencer.m @ 32632:2e484f9f1f18 stable
maint: update Octave Project Developers copyright for the new year
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 22 Dec 2023 12:08:17 -0500 |
parents | 597f3ee61a48 |
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{savg} =} spencer (@var{x}) ## Return @nospell{Spencer's} 15-point moving average of each column of ## @var{x}. ## @end deftypefn function savg = spencer (x) if (nargin != 1) print_usage (); endif [xr, xc] = size (x); n = xr; c = xc; if (isvector (x)) n = length (x); c = 1; x = reshape (x, n, 1); endif w = [-3, -6, -5, 3, 21, 46, 67, 74, 67, 46, 21, 3, -5, -6, -3] / 320; savg = fftfilt (w, x); savg = [zeros(7,c); savg(15:n,:); zeros(7,c);]; savg = reshape (savg, xr, xc); endfunction