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Base R ships with a lot of functionality useful for time series, in particular in the stats package. However, these features are not adapted to most archaeological time series. These are indeed defined for a given calendar era, they can involve dates very far in the past and the sampling of the observation time is (in most cases) not constant.
aion provides a system of classes and methods to represent and work with such time-series. Dates are represented as rata die (Reingold and Dershowitz 2018), i.e. the number of days since 01-01-01 (Gregorian), with negative values for earlier dates. This allows to represent dates independently of any calendar: it makes calculations and comparisons easier.
Once a time series is created with aion, any
calendar can be used for printing or plotting data (defaults to
Gregorian Common Era; see vignette("aion")
).
aion does not provide tools for temporal modeling. Instead, it offers a simple API that can be used by other specialized packages.
To cite aion in publications use:
Frerebeau N, Roe J (2023). _aion: Archaeological Time Series_.
Université Bordeaux Montaigne, Pessac, France.
doi:10.5281/zenodo.8032278 <https://doi.org/10.5281/zenodo.8032278>,
R package version 1.0.2, <https://packages.tesselle.org/aion/>.
Une entrée BibTeX pour les utilisateurs LaTeX est
@Manual{,
author = {Nicolas Frerebeau and Joe Roe},
title = {{aion: Archaeological Time Series}},
year = {2023},
organization = {Université Bordeaux Montaigne},
address = {Pessac, France},
note = {R package version 1.0.2},
url = {https://packages.tesselle.org/aion/},
doi = {10.5281/zenodo.8032278},
}
This package is a part of the tesselle project
<https://www.tesselle.org>.
You can install the released version of aion from CRAN with:
install.packages("aion")
And the development version from GitHub with:
# install.packages("remotes")
::install_github("tesselle/aion") remotes
## Load package
library(aion)
## Set seed for reproductibility
set.seed(12345)
## Create 6 time-series of 50 observations
## Sampled every two years starting from 2000 BP
<- series(
X object = matrix(rnorm(300), nrow = 50, ncol = 6),
time = seq(from = 2000, by = -2, length.out = 50),
calendar = calendar("BP")
)
## Plot
plot(X) # Default calendar
Please note that the aion project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.