subplot(411), plot(time,undak), grid on, xlabel('time [second]'), ylabel('isyarat undak')
subplot(412), plot(time,isyarat1), grid on, xlabel('time [second]'), ylabel('isyarat tunda')
subplot(413), plot(time,isyarat2), grid on, xlabel('time [second]'), ylabel('isyarat lagging1')
subplot(414), plot(time,isyarat3), grid on, xlabel('time [second]'), ylabel('isyarat lagging2')
