yading@10: x3=[1 1 1 1 1 1 1 1 ];
yading@10: X3=fft(x3,8);
yading@10: ejex=linspace(0,1,8);
yading@10: figure('Name','X3');
yading@10: subplot(131);
yading@10: plot(ejex,abs(X3),'*');
yading@10: subplot(132);
yading@10: plot(ejex,angle(X3),'*');
yading@10: 
yading@10: 
yading@10: 
yading@10: