1 ## Copyright (C) 2008 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{ca} @var{cd}] =} dwt(@var{x,lo_d,hi_d})
18 ## Comupte de discrete wavelet transform of x with one level.
21 function [ca cd] = dwt(x,lo_d,hi_d)
22 if (nargin < 3|| nargin > 3)
24 elseif(~isvector(x) || ~isvector(lo_d) || ~isvector(hi_d))
25 error('x, hi_d and lo_d must be vectors');