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Extracting frequency from fft command

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saad
saad 2013-10-16
评论： Tewodros Abebe 2021-6-6
I found a post for you that asking about code for extracting particular frequency from fft,if you don't mind, i need something like that in another algorithm.
Thanks,

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回答（1 个）

Matt J
Matt J 2013-10-17
For an N-point fft with time sampling interval T, the output of fftshift(fft(...)) has frequency axis (Hz) given by,
fAxis=( (0:N-1) -ceil((N-1)/2) )/N/T;
  2 个评论
saad
saad 2013-10-17
sorry, but i didn't how to added to my code.
Tewodros Abebe
Tewodros Abebe 2021-6-6
Sorry, i need to shift center frequency in 2/T. so how can i plot?

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