MATLAB Interface 5

Question 1

Which MATLAB function creates a toolbar button on a figure's toolbar?

Accepted Answer

uipushtool

Answer

uipushtool adds a push button to a uitoolbar object, which itself is attached to a figure.

Question 2

What is the purpose of the 'UserData' property available on all MATLAB graphics objects?

Accepted Answer

Store arbitrary user-defined data attached to the object

Answer

UserData can hold any MATLAB variable, providing a convenient way to attach custom data to any graphics handle.

Question 3

In MATLAB, which function allows you to programmatically simulate a button click on a uicontrol?

Accepted Answer

uicontrol callbacks must be called directly

Answer

There is no built-in clickbutton function; to trigger behavior you invoke the callback function directly with the required arguments.

Question 4

Which property of a MATLAB edit box (uicontrol Style='edit') allows multiline text input?

Accepted Answer

Max set to a value greater than 1

Answer

Setting Max > 1 (typically Max=2) on an edit uicontrol enables multiline input with scrolling.

Question 5

In App Designer, what does the startup function (startupFcn) allow you to do?

Accepted Answer

Initialize component values and app state before the UI is shown

Answer

startupFcn runs automatically after the app is created, making it the correct place to initialize data and set default component values.

MATLAB - MATLAB Technical Computing Practice Test