subplot(311), plot(time,suhu), grid on, xlabel('waktu [sec]'), ylabel('suhu [C]')
subplot(312), plot(time,error), grid on, xlabel('waktu [sec]'), ylabel('error [V]')
subplot(313), 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')