Axis does not plot in app designer

I am making an application in app designer where I use two graphs to show the PWM of a digital controller, the UIAxes of the controller response works fine, but the PWM does not show the graph even when the axes are updated normally.

usada = app.PlacaDropDown.Value;
pcom = app.PuertoCOMEditField.Value;
elcom = strcat('COM', pcom);
app.a = arduino(elcom, usada);
app.parar = false;
app.file_path = uiputfile('*.csv', 'Guardar como');
i = 1;
H1 = 0;
H2 = 0;
selectedTab = app.TabGroup.SelectedTab;
titulo = selectedTab.Title;
switch titulo
    case 'P'
        K = app.K_P.Value;
        t = app.T_P.Value;
        q0 = K;
        q1 = 0.0;
        q2 = 0.0;
    case 'PI'
        K = app.K_PI.Value;
        Ti = app.Ti_PI.Value;
        t = app.T_PI.Value;
        q0 = K * ( 1 + t/2*Ti );
        q1 = -K * ( 1 - t/2*Ti );
        q2 = 0.0;
    case 'PID'
        K = app.K_PID.Value;
        Ti = app.Ti_PID.Value;
        Td = app.Td_PID.Value;
        t = app.T_PID.Value;
        q0 = K * (1 + t/2*Ti + Td/t );
        q1 = -K * (1 - t/2*Ti + 2*Td/t );
        q2 = K*Td/t;
end
while ~app.parar
   muestra(i) = i;
   
   lectura1(i) = readVoltage(app.a,'A1')* 25;
   lectura2(i) = readVoltage(app.a,'A2')* 25;
   if lectura1 >= 40
       writeDigitalPin(app.a, 'D7', 1); 
   else
       writeDigitalPin(app.a, 'D7', 0);
   end
   if lectura2 >= 40
       writeDigitalPin(app.a,'D8',1);
   else
       writeDigitalPin(app.a, 'D8', 0);
   end
   
   if app.Q1CheckBox.Value
       %Actualizacion del vector de error (etapa 1).
       app.e1(1) = app.e1(2);
       app.e1(2) = app.e1(3);
       app.e1(3) = app.tempRef.Value - lectura1(i);
       
       %Actualizacion del vector de control (etapa 1).
       app.u1(1) = app.u1(2);
       app.u1(2) = ControlPID(app.u1, app.e1, q0, q1, q2);

       H1 = app.u1(2) / 100; %Se mapea el PWM obtenico para enviarlo al arduino.
       writePWMDutyCycle(app.a, 'D11', H1);
   end
   
   if app.Q2CheckBox.Value
       %Actualizacion del vector de error (etapa 2).
       app.e2(1) = app.e2(2);
       app.e2(2) = app.e2(3);
       app.e2(3) = app.tempRef.Value - lectura2(i);
       
       %Actualizacion del vector de control (etapa 2).
       app.u2(1) = app.u2(2);
       app.u2(2) = ControlPID(app.u2, app.e2, q0, q1, q2);
           
       H2 = app.u2(2) / 100; %Se mapea el PWM obtenico para enviarlo al arduino.
       writePWMDutyCycle(app.a, 'D10', H2);
   end
   format bank;
   app.matriz1(1, 1) = muestra(i);
   app.matriz1(1, 2) = round(lectura1(i), 2);
   app.matriz1(1, 3) = round(lectura2(i), 2);
   app.matriz1(1, 4) = round(H1 * 100, 2);
   app.matriz1(1, 5) = round(H2 * 100, 2);
   writematrix(app.matriz1, app.file_path, 'WriteMode', 'append');
   
   plot(app.grafica_pwm, muestra(i), H2 * 100, muestra(i), H1 * 100);
   legend(app.grafica_pwm, 'H2', 'H1');
   
   plot(app.grafica_temp, muestra, lectura2, muestra, lectura1);
   legend(app.grafica_temp, 'Lectura2', 'Lectura1');
   
   drawnow;
   i = i + 1;
   %set(app.inicioButton,'BackgroundColor',[0 0 0],'FontColor',[0.96 0.96 0.96],'Text','Sensando...');
   pause(t);
end
function [act] = ControlPID(u, e, q0, q1, q2)
    act = u(1) + q0*e(3) + q1*e(2) + q2*e(1);
    if act >= 100
        act = 100;
    elseif act <= 0
        act = 0;
    end
end

I am grateful for any comments

Answer 1

[Voss]

You are plotting scalars:

plot(app.grafica_pwm, muestra(i), H2 * 100, muestra(i), H1 * 100)

scalars don't show up unless they have a marker.

For example:

figure
plot(2,1) % nothing

figure
plot(2,1,'*') % a point appears in the plot

So maybe you should plot with a marker.

However, you may want to be indexing H1 and H2 in your calculations, similar to lectura1 and lectura2, i.e., calculate H1(i) and H2(i). Then plot those vectors

plot(app.grafica_pwm, muestra, H2 * 100, muestra, H1 * 100);

which would be consistent with the other plot call, which plots vectors:

plot(app.grafica_temp, muestra, lectura2, muestra, lectura1);

[juan david daza perez]

thank you very much, your answer helped me a lot

[Voss]

You're welcome! Any questions, please let me know.