function sig=izak(dzt)%IZAK 	Inverse Zak transform.%	SIG=IZAK(DZT) computes the inverse Zak transform of matrix DZT.%%	DZT : (N,M) matrix of Zak samples.%	SIG : Output signal (M*N,1) containing the inverse Zak transform.%%	Example :%	 sig=fmlin(256); DZT=zak(sig); sigr=izak(DZT);%	 plot(real(sigr)); hold; plot(real(sig)); hold;%%	See also ZAK, TFRGABOR.%	O. Lemoine - February 1996%	Copyright (c) 1996 by CNRS (France).%%	------------------- CONFIDENTIAL PROGRAM -------------------- %	This program can not be used without the authorization of its%	author(s). For any comment or bug report, please send e-mail to %	f.auger@ieee.org [N,M]=size(dzt);if nargin<1,  error('The number of parameters must be one');endsig=zeros(N*M,1);for m=1:M,  sig(m+(0:N-1)*M)=sqrt(N)*ifft(dzt(:,m));end