R/data-eucaleaf.r

In datana: Datasets and Functions to Accompany Analisis De Datos Con R

#' Leaf measurements for Eucalyptus nitens trees in Tasmania, Australia. 
#'
#' @description
#' The length, width, and area of Eucalyptus nitens leaves were measured. 
#' @usage
#' data(eucaleaf)
#' @format Contains leaf-level variables, as follows:
#' \describe{
#'   \item{time}{Time factor, in two levels: early or Late.}
#' \item{tree}{Sample tree code identificator.}
#' \item{shoot}{Shoot description factor, in three levels.}
#' \item{l}{Length of the leaf, in mm.}
#' \item{w}{Width of the leaf, in mm.}
#' \item{la}{leaf area, in cm\eqn{^{2}}{^2}.}
#'  }
#' @source 
#' Although the original source of the measurements is the Dissertation 
#' of Dr Candy (1999), 
#'  the data file used here was courtesy of Prof. Timothy Gregoire at
#'  Yale University (New Haven, CT, USA). Furthermore, these data were used by
#'  Gregoire and Salas (2009).
#' @references
#' - Candy SG. 1999. Predictive models for integrated pest management of the
#' leaf beetle *Chrysophtharta bimaculata* in *Eucalyptus nitens* in Tasmania.
#'  Doctoral dissertation,
#'  University of Tasmania, Hobart, Australia. 
#' @references
#' - Gregoire TG, and Salas C. 2009. Ratio estimation with measurement
#' error in the auxiliary variate. Biometrics 65(2):590-598 
#' \doi{10.1111/j.1541-0420.2008.01110.x}
#' @examples
#' data(eucaleaf)    
#' head(eucaleaf) 
'eucaleaf'