tomwalters@0: % method of class @signal
tomwalters@0: % function sig=autocorrelate(sig,[delay_start],[delay_stop],[normalization_mode])
tomwalters@0: %
tomwalters@0: % calculates the auto corrlelation between of the signal sig
tomwalters@0: % return value is a signal that covers the correlation between 
tomwalters@0: % between delay_start and delay_stop.
tomwalters@0: %
tomwalters@0: %   INPUT VALUES:
tomwalters@0: %       sig: original @signal
tomwalters@0: %		delay_start: start of the correlation : default -length(sig)
tomwalters@0: %		delay_stop: longest delay of the correlation : default length(sig)
tomwalters@0: % 		normalization_mode: normalizateion: default: 'biased' (see help 'xcorr')
tomwalters@0: % 		
tomwalters@0: %   RETURN VALUE:
tomwalters@0: % 		@sig: the correlation values at each delay
tomwalters@0: %
bleeck@3: % This external file is included as part of the 'aim-mat' distribution package
bleeck@3: % (c) 2011, University of Southampton
bleeck@3: % Maintained by Stefan Bleeck (bleeck@gmail.com)
bleeck@3: % download of current version is on the soundsoftware site: 
bleeck@3: % http://code.soundsoftware.ac.uk/projects/aimmat
bleeck@3: % documentation and everything is on http://www.acousticscale.org
bleeck@3: 
tomwalters@0: 
tomwalters@0: function sig=autocorrelate(sig,delay_start,delay_stop,normalization_mode)
tomwalters@0: if nargin==1
tomwalters@0: 	sig=crosscorrelate(sig,sig);
tomwalters@0: else if nargin==2
tomwalters@0: 		sig=crosscorrelate(sig,sig,delay_start);
tomwalters@0: 	else if nargin==3
tomwalters@0: 			sig=crosscorrelate(sig,sig,delay_start,delay_stop);
tomwalters@0: 		else if nargin==4
tomwalters@0: 				sig=crosscorrelate(sig,sig,delay_start,delay_stop,normalization_mode);
tomwalters@0: 			end
tomwalters@0: 		end
tomwalters@0: 	end
tomwalters@0: end