MATLAB: How to create a counter to add and minus

countersubtraction

Im creating a simple counter which helps to add on one button and subtracts when pressing another button. I have done abit of research on this website previously and i found this code. but when i try and change the counter to minus. it doesnt work. Im using MATLAB R2013b GUIDE.
function nurse_Callback(hObject, eventdata, handles)
counter = get(hObject, 'UserData') + 1;
set(hObject, 'UserData', counter);
set(handles.Impt, 'String', sprintf('Number of Nurses currently: %d\n', counter));

Best Answer

Maybe try calling guidata() at the end.
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