smerc: Statistical Methods for Regional Counts

#' @name nydf
#' @title Leukemia data for 281 regions in New York.
#' @description This data set contains 281 observations
#' related to leukeumia cases in an 8 county area of the
#' state of New York.  The data were made available in Waller
#' and Gotway (2005) and details are provided there.
#' These data are related to a similar data set in Waller et
#' al. (1994).  The longitude and latitude coordinates are
#' taken from the NYleukemia data set in the SpatialEpi
#' package for plotting purposes.
#'
#' @docType data
#' @usage data(nydf)
#'
#' @format A data frame with 281 rows and 4 columns:
#' \describe{
#'  \item{longitude}{The longitude of the region centroid.
#'  These are NOT the original values provided by Waller and
#'  Gotway (2005), but are the right ones for plotting correctly.}
#'  \item{latitude}{The latitude of the region centroid.
#'  These are NOT the original values provided by Waller and
#'  Gotway (2005), but are the right ones for plotting
#'  correctly.}
#'  \item{population}{The population (1980 census) of the region.}
#'  \item{cases}{The number of leukemia cases between 1978-1982.}
#'  \item{x}{The original 'longitude' coordinate provided by
#'  Waller and Gotway (2005).}
#'  \item{y}{The original 'latitude' coordinate provided by
#'  Waller and Gotway (2005).}
#' }
#' @source Waller, L.A. and Gotway, C.A. (2005).
#' Applied Spatial Statistics for Public Health Data.
#' Hoboken, NJ: Wiley.
#' @references Waller, L.A., Turnbull, B.W., Clark, L.C.,
#' and Nasca, P. (1994) "Spatial Pattern Analysis to Detect
#' Rare Disease Clusters" in Case Studies in Biometry, N. Lange,
#' L. Ryan, L. Billard, D. Brillinger, L. Conquest, and
#' J. Greenhouse (eds.) New York: John Wiley and Sons.
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