ananke (version 0.1.0)

c14_spd: Summed Probability Distributions

Description

Computes summed probability distributions (SPD) of radiocarbon dates.

Usage

c14_spd(object, ...)
# S4 method for CalibratedAges
c14_spd(object, normalize_date = FALSE, normalize_spd = FALSE)

Value

A CalibratedSPD object.

Arguments

object

A CalibratedAges object.

...

Currently not used.

normalize_date

A logical scalar: should the total probability mass of the calibrated dates be normalised (to sum to unity within the time-span of analysis)?

normalize_spd

A logical scalar: should the total probability mass of the SPD be normalised (to sum to unity)?

Author

N. Frerebeau

Details

Summed probability distributions (SPD) are not statistically valid estimators of the calendar age of a potential future sample. They should not be used in any dates-as-data approach to provide a population proxy.

See Also

Other radiocarbon tools: F14C, c14_calibrate(), c14_combine(), c14_curve(), c14_ensemble(), c14_plot, c14_sample(), c14_uncalibrate(), rec_plot

Examples

## Radiocarbon data from Bosch et al. 2015
data("ksarakil")

## Calibrate
cal <- c14_calibrate(
  values = ksarakil$date,
  errors = ksarakil$error,
  names = ksarakil$code,
  curves = "marine13",
  reservoir_offsets = 53,
  reservoir_errors = 43,
  from = 50000, to = 0
)
plot(cal, level = 0.68)

## SPD
s <- c14_spd(cal)
plot(s)