--- /dev/null
+## Copyright (C) 2007 Muthiah Annamalai <muthiah.annamalai@uta.edu>
+##
+## 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}] =} blackmannuttall(@var{L})
+## Compute the Blackman-Nuttall window.
+## @seealso{nuttallwin, kaiser}
+## @end deftypefn
+
+function [w] = blackmannuttall(L)
+ if (nargin < 1)
+ print_usage;
+ elseif (! isscalar(L))
+ error("L must be a number");
+ endif
+
+ N = L-1;
+ a0 = 0.3635819;
+ a1 = 0.4891775;
+ a2 = 0.1365995;
+ a3 = 0.0106411;
+ n = 0:N;
+ w = a0 - a1.*cos(2.*pi.*n./N) + a2.*cos(4.*pi.*n./N) - a3.*cos(6.*pi.*n./N);
+ w = w.';
+endfunction