% Name: Even_Odd.m
n=-10:10;
x=u(n)-u(n-4);
xe=(x+u(-n)-u(-n-4))/2;
xo=(x-u(-n)+u(-n-4))/2;

subplot(221)
stem(n,x,'r.')
title('The original sequence x[n]')
xlabel('Index n')
grid on
subplot(222)
stem(n,xe,'r.')
title('The even part of x[n]')
xlabel('Index n')
grid on
subplot(223)
stem(n,xo,'r.')
xlabel('Index n')
grid on
title('The odd part of x[n]')