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my_sgolayfilt.m 1.60 KB
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rodralez 提交于 2019-04-06 18:52 . 2019-04-06
function samples_s = my_sgolayfilt (samples)
% my_sgolayfilt: Savitzky-Golay Filtering with variable frame length.
%
% INPUT
% samples: Nx1 samples to be smoothed.
%
% OUTPUT
% samples_s: Nx1 smoothed samples.
%
% Copyright (C) 2014, Rodrigo Gonzalez, all rights reserved.
%
% This file is part of NaveGo, an open-source MATLAB toolbox for
% simulation of integrated navigation systems.
%
% NaveGo is free software: you can redistribute it and/or modify
% it under the terms of the GNU Lesser General Public License (LGPL)
% version 3 as published by the Free Software Foundation.
%
% This program 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 Lesser General Public License for more details.
%
% You should have received a copy of the GNU Lesser General Public
% License along with this program. If not, see
% <http://www.gnu.org/licenses/>.
%
% Reference:
%
% MATLAB help for sgolayfilt function.
%
% Version: 001
% Date: 2018/09/19
% Author: Rodrigo Gonzalez <rodralez@frm.utn.edu.ar>
% URL: https://github.com/rodralez/navego
samples_size = max(size(samples));
sgo_framelen = floor( samples_size / 5);
% sgo_framelen should not be greater than 21.
if (sgo_framelen > 21)
sgo_framelen = 21;
end
% sgo_framelen must be odd
if ( mod(sgo_framelen, 2) == 0 )
sgo_framelen = sgo_framelen +1;
end
sgo_order = ceil( sgo_framelen / 2);
samples_s = sgolayfilt(samples, sgo_order, sgo_framelen);
end
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