function [f,a]=faz(data,dt)% The function FAZ generates a frequency and amplitude using zero-crossing method % applied to data(n,k), where n specifies the length of time series, % and k is the number of IMFs.% Non MATLAB Library routine used in the function is: FINDCRITICALPOINTS.%% Calling sequence-% [f,a]=faz(data,dt)%% Input-%	data	- 2-D matrix of IMF components %	dt	    - time increment per point% Output-%	f	    - 2-D matrix f(n,k) that specifies frequency%	a	    - 2-D matrix a(n,k) that specifies amplitude%% Used by- %	FA% See also-% 	FAZPLUS, which in addition to frequency and amplitude, outputs%	other fields. % Kenneth Arnold (NASA GSFC)	Summer 2003, Modified