matlab环境下进行的小波变换分析

    % 定义信号信息
    fs=2^6;    %采样频率
    dt=1/fs;    %采样间隔
    timestart=-8;
    timeend=8;
    t=(0:(timeend-timestart)/dt-1)*dt+timestart;
    L=length(t);
    z=4*sin(2*pi*linspace(6,12,L).*t);%为待变换信号
    %matlab自带的小波变换
    figure(1)
    [wt,f,coi] = cwt(z,'amor',fs);
    pcolor(t,f,abs(wt));shading interp
    
    
      
      
      
      
      
      
      
      
      
      
      
      
      
    

    clc
    clear all
    close all
    
    data12_20=csvread('E:\experiment\5-5\12-1.csv',22,0);
    t12=data12_20(:,1);
    y12_20=data12_20(:,2);
    z12_20=data12_20(:,