_find_artifacts and zero threshold from _compute_threshold

[pvasilek]

Hello,

neurokit2\signal\signal_fixpeaks.py:307: RuntimeWarning: divide by zero encountered in divide
  mrrs /= th2
neurokit2\signal\signal_fixpeaks.py:307: RuntimeWarning: invalid value encountered in divide
  mrrs /= th2

happens when the signal is very noisy so only a few peaks are detected over a long period.
It is just a warning but may require special handling.

- OS: Windows (WindowsPE 64bit)
- Python: 3.12.2
- NeuroKit2: 0.2.7

- NumPy: 1.26.4
- Pandas: 2.2.0
- SciPy: 1.12.0
- sklearn: 1.4.0
- matplotlib: 3.8.2

[welcome]

Hi 👋 Thanks for reaching out and opening your first issue here! We'll try to come back to you as soon as possible. ❤️

[mrpaulstone]

I'm also having this issue - I'm wondering if a more descriptive warning saying "noisy signal detected" might be an improvement?

[DominiqueMakowski]

I'm wondering if a more descriptive warning saying "noisy signal detected" might be an improvement?

That'd be nice but I'm not sure how to detect that reliably

[stale]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.