Importing Signals into MATLAB's Signal Labeler App

How to Import a Signal in MATLAB?

To import a signal into a specific MATLAB app, such as the Signal Labeler, from your current MATLAB Workspace, follow a straightforward process within the app interface.

While "importing a signal" in MATLAB can broadly refer to loading data from various file types into your Workspace, a common task is to bring signal variables already residing in the Workspace into specialized tools like the Signal Labeler for tasks such as annotation and preparation for analysis or machine learning.

If your signal data (like a time series or array) is already loaded into your MATLAB Workspace, you can easily import it into the Signal Labeler app. This is particularly useful when you need to manually label features, events, or regions within your signals.

Here’s how to import signals from the Workspace into the Signal Labeler:

Steps to Import from Workspace

1. Open or Focus the Signal Labeler App: Launch the Signal Labeler app in MATLAB, or ensure it's the active window if already open.
2. Navigate to the Labeler Tab: Within the Signal Labeler app window, locate and click on the Labeler tab in the app's toolbar.
3. Click Import: In the Labeler tab, find the Import button and click on it.
4. Select 'From Workspace': A dropdown menu will appear. From the list of members or sources, select From Workspace.
5. Choose Signal Variables: A dialog box titled "Import from Workspace" will open. This box lists variables currently available in your MATLAB Workspace.
6. Select Variables to Import: From the list provided in the dialog box, select the variables that contain the signals you want to import into the Signal Labeler. You can typically select multiple variables by holding down the Ctrl (or Cmd on macOS) key while clicking.
7. Confirm Import: Click the appropriate button in the dialog box (usually "OK" or "Import") to confirm your selection.

What Happens After Importing?

Once imported into the Signal Labeler:

• Each selected signal variable is added to the labeled signal set within the app.
• Each imported signal variable is treated as a separate member of this set.
• You can then work with each imported signal member individually within the app, applying labels, reviewing features, and managing your labeled dataset.

This process provides a seamless way to move your prepared signal data from the general MATLAB environment into a dedicated tool for annotation and preparation tasks, enhancing your workflow for signal-based projects.