splinenormalize.m

最新的HHT时频分析程序By Huang and Wu

function [data,a]=splinenormalize(data)
 
% The function SPLINENORMALIZE normalizes with splines,
% the data(n,m) where n specifies the number of time points, 
% and m is the number of IMF components.
% The normalization is carried out with both maxima and minima; hence emax
% is taken as the absolute sign.
%
% Calling sequence-
% [data,a]=splinenormalize(data)
%
% Input-
%	data	- 2-D matrix data(n,m) that specifies the IMF components 
% Output-
%	data	- normalized data
%	a	    - splined envelope
%
% Used by-
%	FA
 
% K. Arnold (for NASA GSFC)	    Jan. 28 2004 Modified
%				(fixed a bug where a "random" point 
%				could get thrown somewhere in the middle
%				of the dataset and the endpoints 
%				were not controlled).
%  Modified Karin Blank March 22, 2005