ecole: ecole: School of Ecology Package

#' @name bison
#' @title National Bison Range Vegetation, Montana, USA
#' @aliases bison
#' @docType data
#' @description
#' Data from University of Montana Biological Station, Plant Ecology class,
#'     1983, Bruce McCune.
#'
#' @format
#' A list of 2 data.frames:\cr
#'     - \code{spe} Species abundance matrix: 19 observations of 50 vascular
#'     plant species.  Values are cover classes, 0-3.\cr
#'     - \code{env} Environmental matrix: 19 observations of 5 environmental
#'     variables.  Descriptions below.
#'
#' @details
#' Documentation follows PC-ORD (McCune and Mefford 2017). Coding for variables
#'     in the second matrix:
#'
#' smoist = percent soil moisture.\cr
#' slope  = slope, in degrees.\cr
#' aspect = aspect code, on 1 to 5 scale, as one of eight compass points
#'     centered on SW (SW = 1, S and W = 2, SE and NW = 3, N and E = 4, NE = 5).\cr
#' elev = elevation above sea level, in meters.  Correspond to five stopping
#'     points for sampling.\cr
#' topo = topographic position class, adapted from scales used by Whittaker and
#'     Kessell (Kessell 1979).\cr
#'
#' @source
#' The unpublished data are from Bruce McCune as communicated in PC-ORD
#'     (McCune and Mefford 2017). Data are from University of Montana Biological
#'     Station, Plant Ecology class, 1983.
#'
#' @references
#' McCune, B., and M. J. Mefford. 2017. PC-ORD. Multivariate Analysis
#'     of Ecological Data. Version 7. MjM Software Design, Gleneden
#'     Beach, OR.
#'
#' @examples
#' # split into two data.frames
#' data(bison)
#' spe <- bison$spe
#' env <- bison$env
#' @keywords datasets
"bison"