subplot(411), plot(time,suhu), grid on, xlabel('waktu [sec]'), ylabel('suhu [C]')
subplot(412), plot(time,error), grid on, xlabel('waktu [sec]'), ylabel('error [V]')
subplot(413), plot(time,kendali), grid on, xlabel('waktu [sec]'), ylabel('kendali [V]')
subplot(414), plot(time,relay), grid on, xlabel('waktu [sec]'), ylabel('ON/OFF Relay')