Compute the Light Regularity Index (LRI)

Calculates a day-to-day regularity index for light exposure, analogous to the Sleep Regularity Index (cf. zeitR::compute_sri()): the probability that a participant is in the same light-exposure state (above/below threshold) at the same clock time on consecutive days, averaged across all comparable epochs.

Usage

compute_lri(traces, threshold = 1000, epoch_minutes = 1)

Arguments

traces

A list of luxR_trace objects for a single participant, one per day, sharing a common epoch length.

threshold

Numeric scalar, illuminance threshold in lux separating "light" and "dark" states. Default 1000.

epoch_minutes

Numeric scalar, epoch length in minutes for comparison across days. Default 1.

Value

A numeric scalar between -100 and 100, in the same units as zeitR::compute_sri().