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{psi,x}] =} shanwavf (@var{lb,ub,n,fb,fc})
18 ## Compute the Complex Shannon wavelet.
21 function [psi,x] = shanwavf (lb,ub,n,fb,fc)
24 elseif (n <= 0 || floor(n) ~= n)
25 error("n must be an integer strictly positive");
26 elseif (fc <= 0 || fb <= 0)
27 error("fc and fb must be strictly positive");
30 x = linspace(lb,ub,n);
31 psi = (fb.^0.5).*(sinc(fb.*x).*exp(2.*i.*pi.*fc.*x));