R/data-standtabRoble.r

In biometrics: A Package for Biometrics and Modelling

#' Stand table for _Nothofagus obliqua_ (roble) secondary forests
#'
#' @description
#' Average stand table for secondary forests of _Nothofagus obliqua_
#' (roble) forests, between 40 and 50 years-old, in the
#' Malleco, Cautín, and Valdiva provinces in southern  Chile.
#' @usage
#' data(standtabRoble)
#' @format The data has the following columns
#' \describe{
#' \item{diam.cl}{Diameter class, in cm.}
#' \item{nha}{Density for the respective diameter class,
#' in trees/ha.}
#'  }
#' @source
#' The stand table is from Puente et al. (1979), as a part of
#' a study regarding secondary _Nothofagus_ forests in
#' southern Chile.
#' @references
#' - Puente M, C Donoso, R Peñaloza, E Morales. 1979. Estudio de
#' raleo y otras técnicas para el manejo de renovales de
#' raulí (_Nothofagus alpina_) y roble (_Nothofagus obliqua_).
#' Etapa I: Identificación y caracterización de renovales de raulí
#' y roble. Informe de convenio No. 5, Proyecto
#' CONAF/PNUD/FAO-CHI/76/003, Santiago, Chile. 88 p.
#' @examples
#' data(standtabRoble)
#' df<-standtabRoble
#' df<-df[-nrow(df),]
#' # Diameter distribution plot 
#' barplot(df$nha, legend = TRUE, beside = TRUE, las=1,
#'         names.arg = df$diam.cl,
#'         ylab="Density (trees/ha)",xlab="Diameter class (cm)")
#' abline(h=0)
"standtabRoble"