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## Copyright (C) 2007 Sylvain Pelissier <sylvain.pelissier@gmail.com>
##
## 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}] =} barthannwin (@var{m})
## Compute the modified Bartlett-Hann window of length @var{m}.
## @seealso{rectwin, bartlett}
## @end deftypefn
function [w] = barthannwin(m)
if (nargin < 1)
print_usage;
elseif (! isscalar(m) || m < 0)
error("M must be a positive integer");
endif
m = round(m);
if (m == 1)
w = 1;
else
N = m - 1;
n = 0:N;
w = 0.62 -0.48.*abs(n./(m-1) - 0.5)+0.38*cos(2.*pi*(n./(m-1)-0.5));
w = w';
endif
endfunction

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