lshift.m

小波变换的模极大值判断冲击函数、阶跃函数、三角形函数的奇异性

function y = lshift(x)
% lshift -- Circular left shift of 1-d signal
%  Usage
%    l = lshift(x)
%  Inputs
%    x   1-d signal
%  Outputs
%    l   1-d signal 
%        l(i) = x(i+1) except l(n) = x(1)
%

	y = [ x( 2:length(x) ) x(1) ];

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% Copyright (c) 1993. Iain M. Johnstone
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