MATLAB: How to refresh a GUI data in a given time step, automatically

automatic updategui variablesrefresh gui

I have written a code that composes of several steps, i.e. several processing steps and then some GUI for visualization and plotting; steps are like: criterion 1, criterion 2, GUI control, and plot.
For repeating of the steps and showing results for different criteria, I need to make the GUI data (variables) get refreshed in a given time step, automatically. I want to embed the functionality within the GUI opening file. I used the following code, but it does not working. Maybe it's because of the 'Running' mode that is 'off'; but I don't know how to turn it on. Could somebody help me, please?
 function my_gui_OpeningFcn
 t = timer;
t.StartDelay = 0.1;
t.ExecutionMode = 'fixedRate'
t.Period = 1
t.TimerFcn = @(myTimerObj, thisEvent)refreshdata(hObject,handles);
start(t)
handles.timer = t
 handles.output = hObject;
guidata(hObject, handles);
end

Best Answer

Unless you are using a nested function that you have not displayed here, in your
t.TimerFcn = @(myTimerObj, thisEvent)refreshdata(hObject,handles);
neither hObject nor handles will be defined. Also, refreshdata() takes only a single parameter unless you supply the option 'caller'.
You have
   function my_gui_OpeningFcn
if instead you had
   function my_gui_OpeningFcn(hObject, event)
then you could use
t.TimerFcn = @(myTimerObj, thisEvent)refreshdata(hObject);
provided that the objects to be refreshed are all children of the GUI figure itself.
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