FFT range for a signal

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Steven
Steven 2015-11-2
编辑： Steven 2015-11-3
Hi
I have a signal from which I want to find the dominant frequency.
Does fft ignore the part which is constant (like DC)? Does that part affect the fft calculations?
Thanks in Advance

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Walter Roberson
Walter Roberson 2015-11-2
fft() does not ignore the DC component. The DC component is returned as the very first vector entry of the result.

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