extrema.m

最新的HHT时频分析程序By Huang and Wu

% This is a utility program for significance test.
%
%   function [spmax, spmin, flag]= extrema(in_data)
%
% INPUT:
%       in_data: Inputted data, a time series to be sifted;
% OUTPUT:
%       spmax: The locations (col 1) of the maxima and its corresponding
%              values (col 2)
%       spmin: The locations (col 1) of the minima and its corresponding
%              values (col 2)
%
% References can be found in the "Reference" section.
%
% The code is prepared by Zhaohua Wu. For questions, please read the "Q&A" section or
% contact
%   [e-mail]
%