Thanks so much for such a prompt reply!
I read your papers about cStress and mCrave and, following a suggestion in one of those papers, I would like to use a similar approach to study self-control (inhibition specifically).
What I want to do right now is:
1) stream RR-intervals from a wrist sensor to a phone,
2) identify anomalies in the data (e.g., motion artifacts),
3) remove these incorrect RR-intervals,
4) impute/interpolate missing data. Without interpolation, spectral analysis would be hard to do.
I was hoping to figure out how you do the interpolation and use this approach in my pilot, citing you of course