Thank you, this is really helpful.
Yeah, the periodogram seems to make things easier. I tried it on the same signal:
Still a bit uncertain about the interpretation. The big spike at 0 I just ignore, right? Then there’s a small spike at around 0.015. Does this correspond that I have about 0.015 oscillations per time units (multiplying up this gives about 30 oscillations over 2000 timeunits, which is what I have)
I understand the amplitude histogram, thanks, will look at it and see what information I can extract. I might also give your package a glance for AR models (but secretly wish I won’t have to…).
Again, lots of thanks!