Creating Graphical User Interfaces

A GUI to Set Simulink Model Parameters

This example illustrates how to create a GUI that sets the parameters of a Simulink® model. In addition, the GUI can run the simulation and plot the results. The following picture shows the GUI after running three simulations with different values for controller gains.

Techniques Used in This Example

This example illustrates a number of GUI building techniques:

• Opening and setting parameters on a Simulink model from a GUI.
• Implementing sliders that operate in conjunction with text boxes, which display the current value as well as accepting user input.
• Enabling and disabling controls, depending on the state of the GUI.
• Managing a variety of shared data using the handles structure.
• Directing graphics output to figures with hidden handles.
• Adding a help button that displays .html files in the MATLAB Help browser.

View Completed Layout and Its GUI M-File

If you are reading this in the MATLAB Help browser, you can click the following links to display the GUIDE Layout Editor and the MATLAB Editor with a completed version of this example. This enables you to see the values of all component properties and to understand how the components are assembled to create the GUI. You can also see a complete listing of the code that is discussed in the following sections.

Note    The following links execute MATLAB commands and are designed to work within the MATLAB Help browser. If you are reading this online or in PDF, you should go to the corresponding section in the MATLAB Help Browser to use the links.

• Click here to display this GUI in the Layout Editor.
• Click here to display the GUI M-file in the editor.

Reading the Selections from the List Box

How to Use the GUI (Text of GUI Help)

© 1994-2005 The MathWorks, Inc.