a33.m

the file contain many matlab signal source code and many example .

L=7;
N=60;
n=1:N;
xn=[ones(1,L),zeros(1,N-L)];
Xk=dfs(xn,N);
magXk=abs([Xk(N/2+1:N) Xk(1:N/2)]);
k=[1:N];
subplot(211)
stem(n,xn)
subplot(212)
stem(k,magXk)