Assistance with Wavelet Frequency Analyzer App

Hello.

I am currently trying to use the Wavelet Frequency Analyzer app in MATLAB, but I am not sure if I am following the correct procedure.

I try to follow the information within the link https://la.mathworks.com/help/wavelet/ug/using-wavelet-time-frequency-analyzer-app.html, with my own data (txt file) but I cannot getting any results.

Plase see the attached file.

I would appreciate your guidance on how to correctly load and visualize external data within the app.

[Chuguang Pan]

There is some examples about how to import data and use Wavelet Frequency Analyzer, such as Using Wavelet Signal Analyzer App. Furthermore, the Wavelet Frequency Analyzer can only analyze 1-D signal as demonstrated in the documentation.

[Angel Lozada]

Hello Chuguang Pan.

I look the link that you sent: https://ww2.mathworks.cn/help/wavelet/ug/select-signal-to-analyze.html.

The instructions begin with this:

There are two different ways you can load a 1-D signal into the app.

• If sig is a workspace variable, you can use the syntax waveletSignalAnalyzer(sig) at the command prompt to open Wavelet Signal Analyzer and obtain the default decomposition of sig.
• You can use the Import Signal dialog box to browse all the variables in the workspace that the app can process, and choose the desired signal.

1. Open Wavelet Signal Analyzer.
2. Open the dialog box by clicking Import on the Analyzer tab.

In my case, the variable I am working with is named

data

It contains 17 columns: the first column represents time, while columns three through seventeen contain the phase and amplitude values of several signals. (Please refer to the attached .txt file for details.)

However, when I open the Wavelet Signal Analyzer app, it appears as though no data has been loaded. The app does not display any of the signals, as shown in the attached .pdf file.

Could you please review the attached files and advise on what might be causing this issue?

Thank you in advance for your support.

Answer 1

[Angel Lozada]

Hello.

I figured out the problem.

Regards.