swh:1:snp:dc80812a22a7696ce24055bd58afbf9f13e3e78c
Tip revision: 24ed3f119945e321909ee421b80508aae198c0d6 authored by Friedrich Leisch on 03 May 2007, 00:00:00 UTC
version 2.0-0
version 2.0-0
Tip revision: 24ed3f1
tribolium.Rd
\name{tribolium}
\alias{tribolium}
\docType{data}
\title{Tribolium beetles}
\description{
The data investigates whether the adult Tribolium species Castaneum has
developed an evolutionary advantage to recognize and avoid eggs of
their own species while foraging.
}
\usage{data("tribolium")}
\format{
A data frame with 27 observations on the following 4 variables.
\describe{
\item{\code{Remaining}}{A numeric vector.}
\item{\code{Total}}{A numeric vector.}
\item{\code{Replicate}}{A factor with levels \code{1}, \code{2}, \code{3}.}
\item{\code{Species}}{A factor with levels \code{Castaneum} \code{Confusum} \code{Madens}.}
}
}
\details{
Beetles of the genus Tribolium are cannibalistic in the sense that
adults eat the eggs of their own species as well as those of closely
related species. The experiment isolated a number of adult beetles of
the same species and presented them with a vial of 150 eggs (50 of
each type), the eggs being thoroughly mixed to ensure uniformity
throughout the vial.
The data gives the consumption data for adult Castaneum species. It
reports the number of Castaneum, Confusum and Madens eggs,
respectively, that remain uneaten after two day exposure to the adult
beetles. Replicates 1, 2, and 3 correspond to different occasions on
which the experiment was conducted.
}
\source{
P. Wang and M.L. Puterman (1998): Mixed Logistic Regression Models.
Journal of Agricultural, Biological, and Environmental Statistics 3
(2), pages 175-200,
}
\examples{
data("tribolium")
tribMix <- stepFlexmix(cbind(Remaining, Total - Remaining) ~ Species, k = 2,
nrep=5, data = tribolium,
model = FLXMRglm(family = "binomial"))
}
\keyword{datasets}