Find the offset of a glucose peak — find_offset • sugaR

Determines peak offset using a hierarchical set of rules, evaluated in order until one succeeds:

First valley after the peak returning to baseline + tolerance.
First crossing below onset + tolerance.
Fallback: two hours after onset.

Usage

find_offset(glucose, timestamps, peak_index, onset, baseline, tol)

Arguments

glucose: Numeric vector, smoothed glucose trace.
timestamps: POSIXct vector, same length as glucose.
peak_index: Integer, index of the selected peak within glucose.
onset: A list as returned by find_onset().
baseline: Numeric scalar, corrected baseline.
tol: Numeric scalar, tolerance (mg/dL) used in the return-to-baseline and onset-crossing checks.

Value

A list with index, time, and value for the offset point, and method indicating which rule was used.