%8-19  ʹstem3ά״ͼĻơ

>> th = (0:127)/128*2*pi;
>> x = cos(th);
>> y = sin(th);
>> f = abs(fft(ones(10,1),128));
>> stem3(x,y,f','d','fill')
>> xlabel('Real')
>>ylabel('Imaginary')
>>zlabel('Amplitude')
>>title('Magnitude Frequency Response')
>>
