1 ## Copyright (C) 1999 Paul Kienzle <pkienzle@users.sf.net>
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/>.
16 ## usage: w = gausswin(L, a)
18 ## Generate an L-point gaussian window of the given width. Use larger a
19 ## for a narrow window. Use larger L for a smoother curve.
21 ## w = exp ( -(a*x)^2/2 )
23 ## for x = linspace(-(L-1)/L, (L-1)/L, L)
25 function x = gausswin(L, w)
27 if nargin < 1 || nargin > 2
30 if nargin == 1, w = 2.5; endif
31 x = exp ( -0.5 * ( w/L * [ -(L-1) : 2 : L-1 ]' ) .^ 2 );