小波变换 matlab 代码
时间: 2023-07-30 11:08:38 浏览: 55
Sure! Here is an example MATLAB code for performing the discrete wavelet transform (DWT) using the Haar wavelet:
```matlab
% Define input signal
x = [1 2 3 4 5 6 7 8];
% Perform DWT using Haar wavelet
[cA, cD] = dwt(x, 'haar');
% Display approximation and detail coefficients
disp('Approximation coefficients (cA):');
disp(cA);
disp('Detail coefficients (cD):');
disp(cD);
```
In this code, the input signal `x` is a row vector with the desired data. The `dwt` function is used to perform the DWT using the Haar wavelet. The outputs `cA` and `cD` represent the approximation and detail coefficients, respectively. The resulting coefficients are displayed using the `disp` function.
Note that you need to have the Wavelet Toolbox installed to use the `dwt` function in MATLAB. If you don't have the toolbox installed, you can use other wavelet functions or implement your own wavelet transform algorithm.
Let me know if you have any further questions!