F14C

Converts F14C values to 14C ages.

Usage

c14_f14c(values, errors, ...)

f14c_c14(values, errors, ...)

# S4 method for class 'numeric,numeric'
c14_f14c(values, errors, tau = 8033)

# S4 method for class 'numeric,numeric'
f14c_c14(
  values,
  errors,
  tau = 8033,
  asymmetric = FALSE,
  rounding = getOption("ananke.round")
)

Arguments

values

A numeric vector giving the radiocarbon ages or the F14C values.

errors

A numeric vector giving the standard deviations.

...

Currently not used.

tau

A length-one numeric vector specifying the mean-life of radiocarbon (defaults to 14C half-life value as introduced by Libby 1952).

asymmetric

A logical scalar: should asymmetric 14C errors be returned (van der Plicht & Hogg, 2006)?

rounding

A character string specifying the rounding convention. It can be one of "none" (the default, no rounding) or "stuiver". Any unambiguous substring can be given.

Value

A data.frame.

Details

f14c_c14() calculates the conventional radiocarbon age:

\(t = -\frac{1}{\lambda}\ln{F^{14}C} = -\tau\ln{F^{14}C}\)

c14_f14c() calculates the inverse:

\(F^{14}C = e^{-\lambda t} = e^{-\frac{t}{\tau}}\)

References

Bronk Ramsey, C. (2008). Radiocarbon Dating: Revolutions in Understanding. Archaeometry, 50:249-275. doi:10.1111/j.1475-4754.2008.00394.x .

Stuiver, M., Polach, H. A. (1977). Discussion Reporting of 14C Data. Radiocarbon, 19(3): 355-363. doi:10.1017/S0033822200003672 .

van der Plicht, J., Hogg, A. (2006). A Note on Reporting Radiocarbon. Quaternary Geochronology, 1(4): 237-240. doi:10.1016/j.quageo.2006.07.001 .

See also

Other radiocarbon tools: c14_calibrate(), c14_combine(), c14_count(), c14_curve(), c14_plot, c14_sample(), c14_spd(), c14_uncalibrate(), rec_plot, ridgelines()

Author

N. Frerebeau

Examples

## Asymmetric 14C errors (van der Plicht and Hogg 2006)
f14c_c14(0.0052, 0.0006, asym = TRUE)
#>        age     plus    minus
#> 1 42246.32 984.8645 877.1979

## Symmetric 14C errors (Bronk Ramsey 2008)
f14c_c14(0.0052, 0.0006, asym = FALSE)
#>        age     plus    minus
#> 1 42246.32 926.8846 926.8846