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#' Münsingen Cemetery
#'
#' A dataset of data set of artifact presence/absence for the Celtic
#' Münsingen-Rain cemetery (Switzerland).
#' @format `r describe_dim(munsingen, what_row = "graves", what_col = "artefact types")`.
#' @references
#' Hodson, F. R. (1968). *The La Tene Cemetery at Münsingen-Rain*. Stämpfli,
#' Bern.
#'
#' Kendall, D. G. (1971). Seriation from abundance matrices. In Hodson,
#' F. R., Kendall, D. G. and Tautu, P. (eds), *Mathematics in the
#' Archaeological and Historical Sciences*. Edinburgh University Press,
#' Edinburgh, 215-232.
#' @examples
#' heatmap(
#' x = as.matrix(munsingen),
#' Rowv = NA,
#' Colv = NA,
#' scale = "none",
#' col = c("white", "black")
#' )
#' @family artefact data
#' @keywords datasets
"munsingen"
#' Mediterranean Shipwrecks
#'
#' A dataset of Mediterranean shipwrecks.
#' @format `r describe_dim(shipwrecks, what_row = "wrecks")`:
#' \describe{
#' \item{name}{[`character`]: wreck name.}
#' \item{sea}{[`character`]: region of the sea where the wreck was discovered.}
#' \item{country}{[`character`]: country where the wreck was discovered.}
#' \item{region}{[`character`]: region where the wreck was discovered.}
#' \item{depth_min}{[`integer`]: minimum depth of the wreck (m).}
#' \item{depth_max}{[`integer`]: maximum depth of the wreck (m).}
#' \item{depth}{[`character`]: depth of the wreck (m).}
#' \item{period}{[`character`]: chronology (period).}
#' \item{dating}{[`character`]: chronology (dating).}
#' \item{date_early}{[`integer`]: earliest date.}
#' \item{date_late}{[`integer`]: latest date.}
#' \item{origin}{[`character`]: place of origin.}
#' \item{destination}{[`character`]: place of destination.}
#' }
#' @references
#' Parker, A. J. (1992). *Ancient Shipwrecks of the Mediterranean and the Roman
#' Provinces*. British Archaeological Reports International Series 580. Oxford.
#'
#' Strauss, E. J. (2007). *Roman Cargoes: Underwater Evidence from the Eastern
#' Mediterranean*. Doctoral thesis, University College London.
#' URL: \url{https://discovery.ucl.ac.uk/id/eprint/1349806}.
#' @source
#' Strauss, J. (2013). *Shipwrecks Database*. Version 1.0. Accessed 2022-08-13.
#' URL: \url{https://oxrep.classics.ox.ac.uk/databases/shipwrecks_database/}
#' @note
#' This dataset contains typos and needs to be normalized.
#' @family artefact data
#' @keywords datasets
"shipwrecks"
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