Hi Jack
As per my understanding, you would like to build a Simulink-based application using App Designer and is looking for guidance on three main topics - Setting stop time, Modifying variables, Displaying variables values live.
1. Set the Simulink Stop Time from App Designer
You can set the stop time of the Simulink model programmatically using -
set_param('YourModelName', 'StopTime', '10') % Example: stop time = 10 seconds
If you want to allow user input for the stop time -
stopTime = app.StopTimeEditField.Value; % Assuming StopTimeEditField is a numeric input in your App
set_param('YourModelName', 'StopTime', num2str(stopTime));
2. Update Runtime Variables Initialized in 'init.m'
If your variables are initialized in an 'init.m' script and used as block parameters, they typically only take effect before simulation starts.
To modify them during simulation, consider using Simulink.Signal objects and 'set_param' or 'setVariable' to change values in the base workspace.
set_param('YourModelName/YourConstantBlock', 'Value', 'newValue');
3. Display Variable Values in Runtime (without plot)
You can use a Numeric Edit Field or Label in App Designer to display the values of variables during simulation. You can periodically update it using a timer or a loop.
app.myTimer = timer('ExecutionMode', 'fixedRate', 'Period', 1,'TimerFcn', @(~,~) updateDisplay(app));
start(app.myTimer);
function updateDisplay(app)
val = evalin('base', 'yourVariable'); % or use get_param if it's from a block
app.ValueDisplayField.Value = val; % Update UI component
end
Remember to stop and delete the timer when you stop the simulation.
I hope this helps.
