#' Enamel thickness and other molar data for hominoids.
#'
#' A dataset containing enamel thickness, enamel area, and other data (see
#' below) for 195 specimens representing 13 species of hominoids.
#'
#' @usage \code{data(enamelthickness)}
#' @format A data frame with 195 rows and 9 variables:
#' \describe{
#' \item{accession}{specimen identifier}
#' \item{taxon}{hominoid species}
#' \item{tooth}{mandibular molar M1, M2, or M3}
#' \item{enamel_area}{enamel area, in mm squared}
#' \item{dentine_area}{dentine area, in mm squared}
#' \item{edj_length}{enamel-dentine junction length, in mm}
#' \item{bcd}{bi-cervical diameter, in mm}
#' \item{aet}{average enamel thickness, in mm}
#' \item{ret}{relative enamel thickness}
#' }
#' @source Skinner MM, Alemseged Z, Gaunitz C, Hublin J-J. 2015. Enamel
#' thickness trends in Plio-Pleistocene hominin mandibular molars.
#' \emph{Journal of Human Evolution} 85:35-45.
#' \url{http://dx.doi.org/10.1016/j.jhevol.2015.03.012}
#'
#' The data were extracted from the supplementary material. The following
#' modifications were made:
#' \itemize{
#' \item citation and basis for tooth identification columns dropped \item
#' consolidated LM1 and RM1 into just M1, and the same for M2 and M3; none
#' of the analyses in the paper itself differentiate between right and left
#' \item fixed an apparent error in the values for bcd, aet, and ret for the
#' specimens of unknown taxonomic attribution (column values were rotated)
#' }
#' @examples
#' boxplot(aet ~ taxon, data=enamelthickness,
#' las=2, cex.axis=0.65)
"enamelthickness"
#' Total energy expenditure and mass for mammals.
#'
#' A dataset containing total daily energy expenditure and mass for 86 species
#' of mammals.
#'
#' @usage \code{data(energyexpenditure)}
#' @format A data frame with 86 rows and 5 variables:
#' \describe{
#' \item{species}{species name}
#' \item{order}{mammalian order}
#' \item{captive}{yes, no, or unknown}
#' \item{mass}{in kg}
#' \item{tee}{total energy expenditure, in kcalories/day}
#' }
#' @seealso \code{\link{energyexpendituretree}} - a matching newick format
#' tree for phylogenetic regression.
#' @source Pontzer H, Raichlin DA, Gordon AD, Schroepfer-Walker KK, Hare B,
#' O'Neill MC, Muldoon KM, Dunsworth HM, Wood BM, Isler K, Burkart J, Irwin M,
#' Shumaker RW, Lonsdorf EV, Ross SR. 2014. Primate energy expenditure and
#' life history. \emph{Proc Natl Acad Sci USA} 111:1433-1437.
#' \url{http://dx.doi.org/10.1073/pnas.1316940111}
#'
#' The data were extracted from the supplementary material. The following
#' modifications were made:
#' \itemize{
#' \item renamed the admixed \emph{Eulemur sp.} as \emph{Eulemur}
#' \item dropped the second \emph{Peromyscus maniculatus} data point (which
#' was not used in primate - nonprimate comparisons in Pontzer et al.)
#' \item \emph{Eremitalpa namibensis} is not a rodent, it's an Afrosoricid
#' }
#' @examples
#' boxplot(aet ~ taxon, data=enamelthickness,
#' las=2, cex.axis=0.65)
"energyexpenditure"
#' Phylogenetic tree for 81 mammalian species.
#'
#' A phylogenetic tree for 81 mammalian species in the
#' \code{\link{energyexpenditure}} dataset.
#'
#' @format A phylogenetic tree in the \code{ape} \code{\link[ape]{phylo}}
#' format.
#' @usage \code{data(energyexpendituretree)}
#' @seealso \code{\link{energyexpenditure}} - a matching dataset of mammalian
#' mass and total energy expenditure.
#' @source Bininda-Emonds ORP, Cardillo M, Jone KE, MacPhee RDE, Deck RMD,
#' Grenyer R, Price SA, Vos RA, Gittleman JL, Purvis A. The delayed rise of
#' present-day mammals. \emph{Proc Natl Acad Sci USA} 111:1433-1437.
#' \url{http://dx.doi.org/10.1038/nature05634}
#'
#' The tree was taken from the supplementary material. The following
#' modifications were made:
#' \itemize{
#' \item reduced to taxa present in the \code{\link{energyexpenditure}}
#' dataset.
#' \item \emph{Euleumur fulvus} used as the tip for the admixed
#' \emph{Eulemur} group
#' \item \emph{Proteles cristatus} renamed to \emph{Proteles cristata} (typo
#' in source)
#' \item \emph{Homo sapiens} renamed to \emph{Homo sapiens} Hadza
#' \item \emph{Canis rufus} used for \emph{Canis familiaris}
#' \item \emph{Chrysochloris asiatica} used for \emph{Eremitalpa namibensis}
#' \item \emph{Lemmus sibiricus} used for \emph{Lemmus trimucronatus}
#' }
#' @examples
#' plot(energyexpendituretree, cex=0.5)
"energyexpendituretree"
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