proper use of DataQueue and PollableDataQueue inside of App Designer class?

Hi all,

I am aware there are some limitations for the usage of Parallel Computing Toolbox inside of App Designer. How could I set up a method that uses a dataqueue and/or a pollable dataqueue to send data back to the client? I keep getting the following warning:

Warning: Unable to save App Designer app object. Save not supported for matlab.apps.AppBase objects. 

I would like to do something similar to the code below

classdef testClass < matlab.apps.AppBase
    properties
        q;
        future1;
    end
    methods
        function app = testClass()
            app.q = parallel.pool.DataQueue;
            app.q.afterEach(@(x) disp(x));
            app.future1 = parfeval(@app.gen,0,app.q);
        end
    end
    methods(Static)
        function gen(q)
            iter = 1;
            while iter < 10
                
                send(q,  randn(1));
                
                iter = iter + 1;
                pause(0.1);
            end
        end
    end
end

Answer 1

[Edric Ellis]

In this case, the problem is not with your DataQueue - it's actually with the function handle you're passing in to parfeval. The syntax @app.gen actually binds the value of app into the function_handle - but you don't need that. So, in this case, you can fix this simply by naming the Static method like so:

app.future1 = parfeval(@testClass.gen,0,app.q);

[dleal]

thank you, works great!