update

y1=sin((pi/2)*x1);

y2=sin((pi/2)*x2);

subplot(4,1,1);

subplot(3,1,1);

stem(n,x1);

title('1.4 (d)-1');

xlabel('n');

ylabel('x_1[n]');

subplot(4,1,2);

subplot(3,1,2);

stem(n,x2);

title('1.4 (d)-2');

xlabel('n');

ylabel('x_2[n]');

subplot(4,1,3);

stem(n,y1,'m--s');

title('1.4 (d)-3');

xlabel('n');

ylabel('(sin(\pi/2) x_1[n])');

subplot(4,1,4);

subplot(3,1,3);

stem(n,y1,'b--s');

hold on;

stem(n,y2,'r--h');

title('1.4(d)-4');

legend('(sin(\pi/2) x_1[n])','(sin(\pi/2) x_2[n])');

title('1.4 (d)-3');

xlabel('n');

ylabel('(sin(\pi/2) x_2[n])');

ylabel('y[n]');

saveas(gcf, "LAB1/P1_4_d_out.png")

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yn1=0.5;

y2=diffeqn(a,x,yn1);

subplot(2,1,1);

stem(n,y1,'r--p');

title('1.5(d)-1');

xlabel('y[-1]=0');

subplot(2,1,2);

stem(n,y2,'m--s');

title('1.5(d)-2');

xlabel('y[-1]=0.5');

hold on;

stem(n,y2,'b--s');

legend('y[-1]=0','y[-1]=0.5');

title('1.5(d)');

saveas(gcf, "LAB1/P1_5_d_out.png")

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