Real-Time Interface between App in AppDesigner and Simulink using parsim

I would like to optimize my progress bar in my Matlab app, which I am building in AppDesigner. I am currently using the app to start my Simulink model with parsim and simulate several simulation runs. However, I do not get any feedback on the progress of the individual simulations. I got the Listener option as a tip. I have implemented this. The specially created updategui.m file works. My question is, how can I combine parsim and the call of the updategui.m file? As soon as the parsim command is executed, I can no longer execute anything else. However, according to the instructions, I have to execute the updategui.m file as soon as the simulation is running. Otherwise exec_event_listener does not work.

Thank you.

Answer 1

[prabhat kumar sharma]

Hello Fabian,

To enhance your progress bar in a MATLAB App Designer application while using parsim for running parallel simulations, you can utilize listeners to track the simulation progress. The main idea is to attach a listener to the SimulationOutput object generated by parsim, and use this to refresh your GUI's progress bar.Steps to Implement a Progress Bar with parsim:

1. Prepare Your Simulink Model:First, make sure your Simulink model is set up to provide progress updates. This could involve adding a custom block or using a MATLAB Function block to send updates to the MATLAB workspace or trigger an event listener.
2. Create a Listener for parsim:When you execute parsim, the SimulationOutput object it returns can have listeners attached to it. These listeners will be responsible for updating your progress bar.
3. Refresh the GUI:The listener should execute a function (such as updategui.m) to update your progress bar in the app.

% Inside your App Designer app, set up the parsim and listener
function runSimulations(app)
    % Configure your Simulink model for parallel simulation
    in = Simulink.SimulationInput('your_model_name');
    % Adjust the input if necessary (e.g., set parameters)

    % Set up the listener for progress updates
    listener = @(src, event) updateProgress(app, event);

    % Run parsim with the listener
    parsimOptions = 'ShowProgress', 'on', 'TransferBaseWorkspaceVariables', 'on';
    simOut = parsim(in, ...
                    'ShowProgress', 'on', ...
                    'TransferBaseWorkspaceVariables', 'on', ...
                    'SetupFcn', @(x) addlistener(x, 'SimulationOutput', 'PostSimFcn', listener));
end

% Function to update progress in the GUI
function updateProgress(app, event)
    % Extract progress information from event
    progress = event.Progress;
    
    % Update your progress bar in the app
    app.ProgressBar.Value = progress; % Assuming you have a ProgressBar component
end

[Fabian]

Thank you for your answer. But now i got an error executing SetupFcn.

Error using nhf>@(x)addlistener(x,'SimulationOutput','PostSimFcn',listener) (line 233)

Not enough input arguments.

in my simulink-modell i do the following. Is something wrong here?

Should i write listener = @nhf (Class)?

This function run in nhf (Class)

 function Simulate(obj)
         for simNr = numel(obj.Data):-1:1
            in(simNr) = Simulink.SimulationInput(obj.simModel);
            for prop = fieldnames(obj.Data(simNr))'
               in(simNr) = in(simNr).setVariable(char(prop), obj.Data(simNr).(char(prop)));
               % tbd: assign to baseworkspace
               % assignin('base',char(prop), obj.Data(simNr).(char(prop)));
            end
            if isdeployed
               in(simNr) = simulink.compiler.configureForDeployment(in(simNr));
            end
         end

         % - Disable the automatic opening of the visualization viewer
         % - Should be done for all models before compiling
         % -------------------------------------------------------------
         %open_system(obj.simModel);
         %set_param(obj.simModel, 'SimMechanicsOpenEditorOnUpdate', 'off');
                
        % Set up the listener for progress updates
         listener = @(src,event) updateProgress(app,event);

         
         % Save results internally
         obj.simOut = parsim(in, ...
             'ShowProgress','on',...
             'TransferBaseWorkspaceVariables','on',...
             'SetupFcn',@(x) addlistener(x, 'SimulationOutput', 'PostSimFcn', listener));