I am not able to reproduce the issue with the given code snippet, so I may not be able to provide the most accurate solution. However, upon analyzing the code snippet shared, it is my understanding that the property to set the color of a lamp is not directly set using `set(app.Lamp, 'Color', 'green')` as you would in traditional MATLAB GUI programming (using set/get with handles). Instead, you work directly with the property of the component.
You can refer to the following code snippet for an example on how this can be done:
function SwitchValueChanged(app, event)
disp('SwitchValueChanged callback triggered'); % Confirm function call
value = app.Switch.Value;
disp(['Switch value: ', value]); % Display switch value
if strcmp(value, 'On')
disp('Setting lamp color to green') % Debugging message
app.Lamp.Color = 'green'; % Directly set the Color property
elseif strcmp(value, 'Off')
disp('Setting lamp color to red') % Debugging message
app.Lamp.Color = 'red'; % Directly set the Color property
end
end
I referred to the following documentation to understand the implementation details of sharing data within App Designer: https://www.mathworks.com/help/matlab/creating_guis/share-data-across-callbacks-in-app-designer.html
Hope this helps!
