calc_calib_curve_equif_dates: Calculate equifinal dates for each point in the calibration...

In eehh-stanford/baydem: Bayesian Tools for Reconstructing Past and Present Demography

Calculate equifinal dates for each point in the calibration curve

Description

Calculate equifinal dates for each point in the calibration curve

Usage

calc_calib_curve_equif_dates(calib_df)

Arguments

calib_df

The calibration data frame, with columns year_BP, uncal_year_BP, and uncal_year_BP_error

Details

The input calibration data frame has three columns: year_BP, uncal_year_BP, and uncal_year_BP_error. For each date in the column year_BP, determine all other dates with the same fraction modern. These dates are equifinal since, in the absence of additional information, there is no way to determine which year a sample came from. Typically the actual equifinal date lies between two observations in year_BP, so linear interpolation is used to estimate the decimal year. A list of length nrow(calib_df) is returned with, for each point in the calibration curve, the following information:

ind_base – The row index in calib_df of the point tau_base – The calendar date (AD) of the point ind_equi – The row index/indices in calib-df of the equifinal points tau_equi – The calendar date(s) (AD) of the equifinal points

Value

A list of equifinality information for each point in the calibration curve (see details)

eehh-stanford/baydem documentation built on June 3, 2024, 5:46 p.m.