1 ## Copyright (C) 2007 Sylvain Pelissier <sylvain.pelissier@gmail.com>
3 ## This program is free software; you can redistribute it and/or modify it under
4 ## the terms of the GNU General Public License as published by the Free Software
5 ## Foundation; either version 3 of the License, or (at your option) any later
8 ## This program is distributed in the hope that it will be useful, but WITHOUT
9 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13 ## You should have received a copy of the GNU General Public License along with
14 ## this program; if not, see <http://www.gnu.org/licenses/>.
17 ## @deftypefn {Function File} {[@var{w}] =} parzenwin(@var{L})
18 ## Compute the Parzen window of lenght L.
19 ## @seealso{rectwin, bartlett}
22 function w = parzenwin (L)
26 error('L must be positive');
35 n1 = n(find(abs(n) <= N/4));
36 n2 = n(find(n > N/4));
37 n3 = n(find(n < -N/4));
39 w1 = 1 -6.*(abs(n1)./(L/2)).^2 + 6*(abs(n1)./(L/2)).^3;
40 w2 = 2.*(1-abs(n2)./(L/2)).^3;
41 w3 = 2.*(1-abs(n3)./(L/2)).^3;