R/shorebirds.R

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

#' shorebirds data
#'
#' 
#' Two-phase sample of shorebird nests. These are artificial data constructed
#'from summary statistics given in Bart and Earnst (2002).
#'
#'
#' @format This data frame contains the following columns:
#' \describe{
#'\item{plot:}{plot number}
#'
#'\item{rapid:}{rapid-method count of number of birds in plot}
#'
#'\item{intense:}{intensive-method count of number of nests in plot
#'
#'  = NA if the plot is not in the phase II sample}
#'  }
#'  
#'
#' @docType data
#'
#' @usage data(shorebirds)
#'
#'
#'
#' @keywords datasets
#' 
#'@references Bart, J. and S. Earnst (2002). Double-sampling to estimate density and population trends
#' in birds. \emph{The Auk 119}, 36–45.
#'
#' @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.
#'
#' 
#' 
#' 
"shorebirds"