subplot(3, 1, 1); plot(t, y) subplot(3, 1, 2) plot(t, y3 subplot(3, 1, 3) plot(t, y2)subplot(3,1,1); plot(t,y) subplot(3,1,2); plot(t,y3) subplot(3,1,3); plot(t,y2) 0 1 2 3 4 5 6 7 -1 0 1 0 1 2 3 4 5 6 7 -1 0 1 0 1 2 3 4 5 6 7 -1 0 1