c14

c14 provides basic classes and functions for radiocarbon data in R. It makes it easier to combine methods from several existing packages (e.g. rcarbon, Bchron, oxcAAR, c14bazAAR, ArchaeoPhases, stratigraphr) together and work with them in a tidy data workflow.

It was forked from stratigraphr v0.3.0.

Installation

You can install the development version of c14 from GitHub with the remotes package:

# install.packages("remotes")
remotes::install_github(c("joeroe/controller", "joeroe/c14"))

Note that the dependency controller is also not yet available on CRAN.

Usage

The main aim of c14 is to make it easier to work with radiocarbon data within a tidy workflow. For example, we can combine dplyr::filter() with c14_calibrate() to only calibrate dates from a specific site:

library("c14")
library("dplyr", warn.conflicts = FALSE)

ppnd |>
  filter(site == "Ganj Dareh") |>
  select(lab_id, cra, error) |>
  mutate(cal = c14_calibrate(cra, error))
#> Warning: `x` has more than one modal value. Only the first will be returned.
#> `x` has more than one modal value. Only the first will be returned.
#> # A tibble: 9 × 4
#>   lab_id     cra error             cal
#>   <chr>    <int> <int>           <cal>
#> 1 GaK 807  10400   150 c. 12200 cal BP
#> 2 OxA 2099  8840   110  c. 9900 cal BP
#> 3 OxA 2100  9010   110 c. 10200 cal BP
#> 4 OxA 2101  8850   100 c. 10100 cal BP
#> 5 OxA 2102  8690   110  c. 9560 cal BP
#> 6 SI 922    8570   210  c. 9540 cal BP
#> 7 SI 923    8625   195  c. 9545 cal BP
#> 8 SI 924    8640    90  c. 9550 cal BP
#> 9 SI 925    8385    75  c. 9440 cal BP

The resulting cal-class vector can be assigned to a new column, allowing us to keep working with the data in the context of the original data frame or tibble.