[Numpy-discussion] Recognizing a cycle in a vector

[Daniel Sank]

Manolo,

>> Is there any way to check for cycles in this situation?

> Fast fourier transform (fft)?

+1 For using a discrete Fourier transform, as implemented by numpy.fft.fft.
You mentioned that you sample at points which do not correspond with the
period of the signal; this introduces a slight complexity in how the
Fourier transform reflects information about the original signal. I attach
two documents to this email with details about those (and other)
complexities. There is also much information on this topic online and in
signal processing books.
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