R/data-presenceIce.r

In datana: Datasets and Functions to Accompany Analisis De Datos Con R

#' Presence or absence of sea ice from logbook records of annual cruises
#' @description
#' Data containing 52717 observations about presence of sea ice from logbook
#'  records of annual cruises to the B-C-B in an unbroken record between
#'  years 1850 to 1910.
#' @usage
#' data(presenceIce)
#' @format The dataframe contains the following columns:
#' \describe{
#'   \item{ship.id}{The code number for ships.}
#'   \item{move.type}{Type of movement of ships. 0 indicates a sail-powered
#'   vessel and 1 indicates an auxiliary-powered vessel.}
#'   \item{year}{Year of registry.}
#'   \item{month}{Month of registry.}
#'   \item{day}{Day of registry.}
#'   \item{lat.dec}{Decimal latitude.}
#'   \item{long.dec}{Decimal longitude.}
#'   \item{e.w}{East or west of the Prime Meridian.}
#'   \item{ice.cov}{Sea Ice Observed. 0 no see (Not registered) and 1 presence
#'    sea ice (Registered).}
#'  }
#' @source
#' The data were provided from Sea Ice Group at the Geophysical Institute.
#' @references
#' Mahoney A, Bockstoce J, Botkin D, Eicken H, Nisbet R. 2011. Sea-Ice
#' Distribution in the Bering and Chukchi Seas: Information from Historical
#' Whaleships' Logbooks and Journals
#' ARCTIC. 64(4): 465-477.
#' @examples
#' data(presenceIce)
#' head(presenceIce)
'presenceIce'