The plotting freezes and does not render any more data

Hello,

version of matlab: 2020a

describe problem: I have created an application in the app designer, where I collect data, which I then transfer to the simulink, where I perform system simulation. Then I draw this data into the plot. I get all the data from the simulink, but when drawing to the plot, it happens that the drawing freezes and does not continue. For example, I can close the application or click on the buttons, but the graph is not drawn. Sometimes it also happens that I can't restart the application using the RUN button and I have to restart the whole matlab.

I have another system in the application that is drawn into the plot without a problem.

Demonstration of what the plot will gradually display. The data in the simulink is across the entire timeline. Only 1/6 of the data is plotted here, for example.

cla(app.O_Z_N_K_Animace_Nadrze

sim = sim('Simulink_al');

number_of_values = length(sim.reg{1}.Values.Data);

hold(app.Plot,'on')

plot(app.Plot,sim.reg{1}.Values.Time(1:number_of_values),sim.reg{1}.Values.Data(1:num_of_values), 'b--', 'LineWidth', 1);

plot_vel = plot(app.Plot,sim.reg{2}.Values.Time(1),sim.reg{2}.Values.Data(1), 'LineWidth', 2);

hold(app.E_V_M_Graficke_Prubehy,'off')

for r = 1:number_of_values

hold(app.Plot,'on')

set(graf_regulovana_velicina,'Ydata',sim.reg{2}.Values.Data(1:r),'Xdata',sim.reg{2}.Values.Time(1:r));

hold(app.Plot,'off')

if (r == number_of_values)

app.Button_Start.Enable = true;

end

pause(0.02)

end

I have about 2000 lines of code in this application, but this part of the code shown here is executed when the rendering freezes.

As I mentioned earlier, I did not have such problems, but now there are various freezes, whether rendering the graph or the entire application. Where the solution is only a complete restart of the matlab.

Sometimes I get this error back. But it's not always the same. Sometimes I don't even get this error message.

Warning: An error occurred while drawing the scene: Could not find node in peer tree during

replaceChild

Warning: An error occurred while drawing the scene: Could not find node in peer tree during

reparentChildren

If I have the content of this variable listed, for example. So I got the complete data from the simulink. So the program has complete data, but it only plots a part and freezes.

disp(sim.reg{2}.Values.Data) OR disp(sim.reg{2}.Values.Time)

Thank you very much for any help

[Rik]

I don't see an indication of why your plot would freeze. You don't create thousands of graphics objects in your loop, which is a common cause of issues.

With your syntax you don't need the calls to hold, since you directly change object properties. I don't think that will have any effect in your code.