smerc: Statistical Methods for Regional Counts

#' @name nysf
#' @title \code{sf} object for New York leukemia data.
#' @description The number of incident leukemia cases from
#'   1978-1982 per census tract for an 8-county region of
#'   upstate New York.
#'
#'   This is the same data as in \code{nydf} in a different
#'   format.
#'
#'   Note that the coordinates in the polygons have been
#'   projected to a different coordinate system (UTM, zone
#'   18) compared to \code{nydf}, but the order of the
#'   regions/polygons is the same as in \code{nydf}.
#'
#' @format A \code{sf} with 281 rows and 18 columns:
#' \describe{
#'  \item{areaname}{The name of the region.}
#'  \item{areakey}{Census tract id.}
#'  \item{xorig}{x-coordinate associated with the centroid of each region on the ORIGINAL scale.}
#'  \item{yirug}{y-coordinate associated with the centroid of each region on the ORIGINAL scale.}
#'  \item{pop8}{The population (1980 census) of the region.}
#'  \item{tractcas}{The number of leukemia cases between 1978-1982, rounded to two decimal places.}
#'  \item{propcas}{The proportion of cases relative to population.}
#'  \item{pctownhome}{The percentage of homeowners in the tract.}
#'  \item{pctage65p}{The percentage of residents aged 65 or older.}
#'  \item{Z}{A transformation of exposure to TCE, specifically log(1000(TCE + 1)/pop8).}
#'  \item{avgidist}{Average inverse distance to the nearest TCE site.}
#'  \item{pexpossure}{}
#'  \item{cases}{The number of leukemia cases between 1978-1982.}
#'  \item{xm}{A shifted version of \code{x}.}
#'  \item{ym}{A shifted version of \code{y}.}
#'  \item{x}{x-coordinate associated with the centroid of each region.}
#'  \item{y}{y-coordinate associated with the centroid of each region.}
#'  \item{geometry}{The geometry list column of the object.}
#'  }
#'
#' @docType data
#' @usage data(nysf)
#' @source Bivand, R. S., Pebesma, E. J., Gomez-Rubio, V.,
#' and Pebesma, E. J. (2013). Applied Spatial Data Analysis
#' with R, 2nd edition. New York: Springer.
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