/usr/share/octave/packages/signal-1.3.2/window.m is in octave-signal 1.3.2-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | ## Copyright (C) 2008 David Bateman
##
## This program 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.
##
## 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 General Public License for more
## details.
##
## You should have received a copy of the GNU General Public License along with
## this program; if not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{w} =} window (@var{f}, @var{m})
## @deftypefnx {Function File} {@var{w} =} window (@var{f}, @var{m}, @var{opts})
## Create an @var{m}-point window from the function @var{f}. The function
## @var{f} can be for example @code{@@blackman}. Any additional
## arguments @var{opt} are passed to the windowing function.
## @end deftypefn
function wout = window (f, m, varargin)
if (nargin == 0)
error ("window: UI tool not supported");
elseif (nargin < 2)
print_usage ();
else
w = feval (f, m, varargin{:});
if (nargout > 0)
wout = w;
endif
endif
endfunction
%!assert (window (@bartlett, 16), window ("bartlett", 16))
%!assert (window (@hamming, 16), window ("hamming", 16))
%!assert (window (@hanning, 16), window ("hanning", 16))
%!assert (window (@triang, 16), window ("triang", 16))
%% Test input validation
%!error window ()
%!error window (1)
%!error window ("hanning")
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