R/santacruz.R

In SDAResources: Datasets and Functions for 'Sampling: Design and Analysis, 3rd Edition'

#' santacruz data
#'
#' The number of seedlings in the sampled psus on Santa Cruz Island, California, in 1992 and 1994.
#'
#'
#'
#' @format This data frame contains the following columns:
#'\describe{
#'\item{tree:}{tree number}
#'
#'\item{seed92:}{number of seedlings in 1992}
#'
#'\item{seed94:}{number of seedlings in 1994}
#'}
#'
#'
#' @docType data
#'
#' @usage data(santacruz)
#'
#'
#'
#' @keywords datasets
#' 
#' @references Peart, D. (1994). Impacts of Feral Pig Activity on Vegetation Patterns Associated with
#' Quercus agrifolia on Santa Cruz Island, California. \emph{Ph.D. dissertation}. Tempe, AZ:
#' Arizona State University.
#'
#' @references Lohr (2021), Sampling: Design and Analysis, 3rd Edition. Boca Raton, FL: CRC Press.
#' 
#'@references Lu and Lohr (2021), R Companion for \emph{Sampling: Design and Analysis, 3rd Edition}, 1st Edition. Boca Raton, FL: CRC Press.
#' 
#'
"santacruz"