Age-to-Ring Mapping Function Calculate_K(a) Deterministically maps true age to the expected annuli count, given a survey date, an annual ring-formation day, and a minimum age threshold.

Age-to-Ring Mapping Function Calculate_K(a) Deterministically maps true age to the expected annuli count, given a survey date, an annual ring-formation day, and a minimum age threshold.

Usage

calculate_K(age_in_years, survey_date, annuli_date, annuli_min_age)

Arguments

age_in_years

A numeric vector of true ages in years.

survey_date

The survey date as a numeric year (e.g., 2023.25).

annuli_date

Ring formation day as fraction of a year in [0, 1).

annuli_min_age

The minimum age (years) required to form the first ring.

Value

An integer vector with the calculated number of rings (K) for each age.