function [fm,B]=locfreq(sig);%LOCFREQ Frequency localization caracteristics.%	[FM,B]=LOCFREQ(SIG) computes the frequency localization %	caracteristics of signal SIG.% %	SIG   is the signal.%	FM    is the averaged normalized frequency center.%	B     is the frequency spreading.%%	Example :%	 z=amgauss(160,80,50);[tm,T]=loctime(z),[fm,B]=locfreq(z),B*T%%	See also LOCTIME.%	F. Auger, July 1995.%	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,sigc]=size(sig);if (sigc~=1), error('The signal must have 1 column');else No2r=round(N/2); No2f=fix(N/2); Sig=fft(sig); Sig2=abs(Sig).^2; Sig2=Sig2/mean(Sig2); freqs=[0:No2f-1 ,-No2r:-1]'/N; fm=mean(freqs.*Sig2); B=2*sqrt(pi*mean((freqs-fm).^2.*Sig2));end;