小波分析函数

代码说明：

%WAVELET  1D Wavelet transform with optional singificance testing %WAVELET 一维小波变换，具有可选的重要性测试 %   [WAVE,PERIOD,SCALE,COI] = wavelet(Y,DT,PAD,DJ,S0,J1,MOTHER,PARAM) % %   Computes the wavelet transform of the vector Y (length N), %   with sampling rate DT. % %   By default, the Morlet wavelet (k0=6) is used. %   The wavelet basis is normalized to have total energy=1 at all scales. % % % INPUTS: % %    Y = the time series of length N. %    DT = amount of time between each Y value, i.e. the sampling time. % % OUTPUTS: % %    WAVE is the WAVELET transform of Y. This is a complex array %    of dimensions (N,J1+1). FLOAT(WAVE) gives the WAVELET amplitude, %    ATAN(IMAGINARY(WAVE),FLOAT(WAVE) gives the WAVELET phase. %&n