shuffle.m

替代数据生成算法。包括常用的随机相位法(shuffle.m and surrogate.m)

function y=shuffle(z);

% function y=shuffle(z);
%
% The ts z is shuffled randomly to result in the surrogate (but time 
% uncorrelated ts) y.
%
% 
%
%Michael Small
%3/3/2005
[e-mail]

y=randn(size(z));
[y,i]=sort(y);
y=z(i);