How to Export Data from Wavelet Analzer Tool

Hello Friends,

I used waveletAnalyzer toolbox in Matlab to diagnose the bearing fault vibration signal.

However, I de-composed and de-noised the signal.

I clicked "File" toolbar but it can only export the De-Noised Signal (Ds) the purple graph

In this case, I want to export Detail Coefficient 4 (d4) which is green graph with red circle in the picture below.

[Santosh Fatale]

Hi Pasu,

Could you please share the sample code and the data required to reproduce the results shared by you in image?

Answer 1

[Santosh Fatale]

Hi Pasu,

I understand that you want to extract the details coefficients generated by Wavelet Analyzer App. Please go through details below for possible workaround.

• The Wavelet Analyzer app is no longer recommended and will be removed in a future release, see (To be removed) Analyze signals and images using wavelets - MATLAB (mathworks.com).
• If you are interested in denoising the signal, it is recommended to use the Wavelet Signal Denoiser App Visualize and denoise time series data - MATLAB (mathworks.com).
• The Wavelet Analyzer App does not have an option to export the details coefficients from the app.

However, there is a potential workaround as follows:

1. Launch the Wavelet Signal Denoiser App and import the desired data. Here's a good example of how to use the App. Denoise a Signal with the Wavelet Signal Denoiser - MATLAB & Simulink (mathworks.com)
2. In the App, go to 'Export' -> 'Generate MATLAB Script'.
3. Modify the output of the function 'wdenoise' to be '[XDEN,DENOISEDCFS,ORIGCFS]'. The second and third output arguments are coefficients you desire. For more information, you can refer to - Wavelet signal denoising - MATLAB wdenoise (mathworks.com).