first time poster.
I'm trying to determine the length of a repeating sequence, with noise. I.e. given the sequence 4, 12, 3, 4, 12, 3, 4, 12, 3, ... the period is apparently 3.
Now, what if the sequence was more complicated. What if each value had added noise? I was thinking of something with autocorrelation, or Fourier transform (my intuition tells me the repeating signal has a major frequency component, right? How can I determine which?)
It feels like this should be easy, but I'm having trouble implementing a solution.