FFT of a selected number of data points.
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I have a waveform as the one attached and I need to perform FFT over a small section of this waveform (like the one highlighted by a rectangle). How can I do that? I don't have any prior experience of working in frequency domain. Any help would be greatly appreciated.
回答（2 个）
Sander Hermanussen
2015-5-28
0 个投票
fft(yoursignal(first_sample,second_sample))
I.e., simply select a range of your signal.
doc fft
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