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DFT question. can someone assist?

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scdoro

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Hi all,

Can anyone help me comment on the below code and explain how the function works.I am not sure how this function works and why is there a mid value in the calculation?

Thanks a lot!

regards
 

The main string is
H=fftshift(fft(x,n));

it calculates Fourier transform of length 'n'.

All other strings above calculate only respective frequency points from -pi to pi.

What namely for you is not clear?
 

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