% DTFT priklad
SIGSIZE=512
   
   mysig_n= [1, 1, 0, 0];
   %pri akych n mal signal uvedene hodnoty
   %mysig_n=[0,1,2,3];
   %mysig_n=[0,-1,-2,-3];
   
   
   n=0:1:SIGSIZE-1;
   Omega=(0:1:SIGSIZE-1)/SIGSIZE*2*pi
   F1=zeros(1,SIGSIZE);
   for a=1:length(mysig_n)
      F1=F1+mysig_n(a)*exp(-i*Omega*(a-1));
   end
   
   subplot(3,1,1)
   stem(mysig_n); grid on;
   subplot(3,1,2)
   plot(Omega,abs(F1)); grid on;
   subplot(3,1,3)
   plot(Omega,angle(F1)); grid on;