Month: December 2025

HRV is often reduced to a single number—usually RMSSD. But that number alone can’t explain how the autonomic nervous system is actually regulating the heart. This article walks through time-domain, nonlinear, and frequency-domain HRV metrics to show the difference between how much variability exists and how that variability is structured.

This post is a practical demonstration of exploratory data analysis (EDA) in action. Using a large diabetes dataset, I focus on how to interrogate feature distributions, assess overlap and separation, evaluate interactions, and translate visual patterns into testable modeling hypotheses. The emphasis is on how to think with data before building models—not on model performance…