1.4第四题

n= -5:1:5;

x1=[zeros(1,5) 1 zeros(1,5)];

x2=5*[zeros(1,5) 1 zeros(1,5)];

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

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

subplot(4,1,1);

stem(n,x1);

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

xlabel('n');

ylabel('x1[n]');

subplot(4,1,2);

stem(n,x2);

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

xlabel('n');

ylabel('x2[n]');

subplot(4,1,3);

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

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

xlabel('n');

ylabel('sin(\pi/2) x1[n]');

subplot(4,1,4);

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

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

xlabel('n');

ylabel('sin(\pi/2) x2[n]');

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