连续小波变换演示

源代码

Fs = 1000;
t = linspace(0,5,5e3);
x = 2*cos(2*pi*100*t).*(t<1)+cos(2*pi*50*t).*(3<t)+0.3*randn(size(t));
plot(t,x)
figure
xlabel('Time (s)')
ylabel('Amplitude')
cwt(x,Fs)

图像演示

参考网址

https://ww2.mathworks.cn/help/wavelet/gs/continuous-wavelet-analysis.html