MATLAB Creating Graphical User Interfaces

Automatically Refresh Plot in a GUIDE UI

Automatically Refresh Plot in a GUIDE UI

In this section...

“About the Example” on page 9- 79

“The Timer Implementation” on page 9- 81

About the Example

This example shows how to refresh a display by incorporating a timer in a UI that

updates data. Timers are MATLAB objects. Programs use their properties and methods

to schedule tasks, update information, and time out processes. For example, you can set

up a timer to acquire real-time data at certain intervals, which your UI then analyzes

and displays.

The UI displays a surface plot of the peaks function and contains three uicontrols:

• The Start Randomizing push button — Starts the timer running, which executes
  at a rate determined by the slider control. At each iteration, random noise is added to
  the surface plot.


• The Stop Randomizing push button — Halts the timer, leaving the surface plot in
  its current state until you click the Start Randomizing button again.


• The Timer Period slider — Speeds up and slows down the timer, changing its period
  within a range of 0.01 to 2 seconds.