Automates cardiovagal state regulation mapping by translating raw, noisy mammalian heart rate variability intervals into a standardized linear index using fixed physiological anchors. The package incorporates natural log data compression and utilizes two-one-sided tests (TOST) and Bayesian Region of Practical Equivalence (ROPE) thresholds to mathematically verify cross-species homeostatic synchronization. Methodologies for equivalence testing and regional practical equivalence bounds follow Lakens (2017)