Creating Graphical User Interfaces

Accessing Workspace Variables from a List Box

This GUI uses a list box to display workspace variables, which the user can then plot.

Techniques Used in This Example

This example demonstrates how to:

• Populate the list box with the variable names that exist in the base workspace.
• Display the list box with no items initially selected.
• Enable multiple item selection in the list box.
• Update the list items when the user press a button.
• Evaluate the plotting commands in the base workspace.

The following figure illustrates the layout.

Note that the list box callback is not used in this program because the plotting actions are initiated by push buttons. In this situation you must do one of the following:

• Leave the empty list box callback in the application M-file.
• Delete the string assigned to the list box Callback property.

View the Layout and Application M-File

Use these links to display the FIG-file in the Layout Editor and the application M-file in the MATLAB Editor. This enables you to see the values of all component properties and to explore how the components are assembled to create the GUI. You can also see the complete code listing.

Note    The following link adds a directory to the end of your MATLAB path.

Click here to display the layout in GUIDE.

Click here to display the application M-file in the editor.

The List Box Callback

Reading Workspace Variables