CODEWITHSUNDEEP
pythonscipy
Anzel
Anzel

Reputation: 23

Is there a major difference between the two scipy Hilbert transforms?

I was looking for Hilbert transforms in the scipy package and I noticed there are two versions of the Hilbert transform--one in scipy.fftpack and the other in scipy.signal. I saw that they differ in the outputs being complex conjugates, but are there any other fundamental difference between the two Hilbert transforms I should be aware of before using one version or the other? Nothing particularly jumped out at me when I looked at the source-code.

Upvotes: 2

Views: 2942

Answers (1)

rofls
rofls

Reputation: 5115

From the pages, scipy.signal.hilbert computes the analytic signal, using the Hilbert transform. Namely, the analytical signal, 

x_a = x + i*y

where y is the hilbert transform. On the other hand, scipy.fftpack.hilbert is just the Hilbert transform. If you want the Hilbert transform, not the analytical signal, use scipy.fftpack.hilbert.

Upvotes: 3

Related Questions