younger: Find the probability of a calibrated date being of a certain...

In rice: Radiocarbon Equations

Find the probability of a calibrated date being of a certain age or younger than it

Description

Find the probability that a sample is of a certain calendar age x or younger than it, by calculating the proportion of the calibrated distribution up to and including x (i.e., summing the calibrated distribution up to year x).

Usage

younger(
  x,
  y,
  er,
  cc = 1,
  postbomb = FALSE,
  deltaR = 0,
  deltaSTD = 0,
  normal = TRUE,
  as.F = FALSE,
  is.F = FALSE,
  t.a = 3,
  t.b = 4,
  BCAD = FALSE,
  threshold = 0
)

Arguments

x	The year of interest, in cal BP by default.
y	The radiocarbon date's mean.
er	The radiocarbon date's lab error.
cc	calibration curve for the radiocarbon date(s) (see the rintcal package).
postbomb	Whether or not to use a postbomb curve (see caldist()).
deltaR	Age offset (e.g. for marine samples).
deltaSTD	Uncertainty of the age offset (1 standard deviation).
normal	Use the normal distribution to calibrate dates (default TRUE). The alternative is to use the t model (Christen and Perez 2016).
as.F	Whether or not to calculate ages in the F14C realm. Defaults to as.F=FALSE, which uses the C14 realm.
is.F	Use this if the provided date is in the F14C realm.
t.a	Value a of the t distribution (defaults to 3).
t.b	Value b of the t distribution (defaults to 4).
BCAD	Which calendar scale to use. Defaults to cal BP, BCAD=FALSE.
threshold	Report only values above a threshold. Defaults to threshold=0.

Details

The function can only deal with one date at a time.

Value

The probability of a date being of a certain calendar age or younger than it.

Author(s)

Maarten Blaauw

Examples

younger(2800, 2450, 20)
younger(2400, 2450, 20)
calibrate(160, 20, BCAD=TRUE)
younger(1750, 160, 20, BCAD=TRUE)

rice documentation built on April 11, 2025, 5:53 p.m.