subplot(411), plot(time, pompa), grid on, xlabel('time [sec]'), ylabel('pompa [mm/sec]')
subplot(412), plot(time, gangguan), grid on, xlabel('time [sec]'), ylabel('gangguan [mm/sec]')
subplot(413), plot(time, level), grid on, xlabel('time [sec]'), ylabel('level [mm]')
subplot(414), plot(time, error), grid on, xlabel('time [sec]'), ylabel('error [mm]')
