\name{chamae2}
\docType{data}
\alias{chamae2}
\title{Life History Data on Chamaecrista fasciculata}
\description{
  Data on life history traits for the partridge pea
  \emph{Chamaecrista fasciculata}
}
\usage{chamae2}
\format{
  A data frame with records for 2239 plants.
  Data are already in \dQuote{long} format; no need to reshape.
   \describe{
    \item{resp}{Response vector.}
    \item{varb}{Categorical.  Gives node of graphical model corresponding
      to each component of \code{resp}.  See details below.}
    \item{root}{All ones.  Root variables for graphical model.}
    \item{id}{Categorical.  Indicates individual plants.}
    \item{STG1N}{Numerical.  Reproductive stage.  Integer with only 3 values
      in this dataset.}
    \item{LOGLVS}{Numerical.  Log leaf number.}
    \item{LOGSLA}{Numerical.  Log leaf thickness.}
    \item{BLK}{Categorical.  Block within experiment.}
  }
}
\details{
The levels of \code{varb} indicate nodes of the graphical model to which
the corresponding elements of the response vector \code{resp} belong.
This is the typical \dQuote{long} format produced by the R \code{reshape}
function.  For each individual, there are several response variables.
All response variables are combined in one vector \code{resp}.
The variable \code{varb} indicates which \dQuote{original} variable
the number was for.  The variable \code{id} indicates which individual
the number was for.  The levels of \code{varb}, which are the names
of the \dQuote{original} variables are
\describe{
  \item{fecund}{Fecundity.  Bernoulli, One if any fruit, zero if no fruit.}
  \item{fruit}{Integer.  Number of fruits observed.}
}
}
\source{
Julie Etterson
\url{http://www.d.umn.edu/biology/faculty/Etterson_page1.htm}
}
\references{
These data have been previously analyzed by non-aster methods in the following.

Etterson, J.~R. (2004).
Evolutionary potential of \emph{Chamaecrista fasciculata} in
    relation to climate change.  I. Clinal patterns of selection along
    an environmental gradient in the great plains.
\emph{Evolution}, \bold{58}, 1446-1458.

Etterson, J.~R., and Shaw, R.~G. (2001).
Constraint to adaptive evolution in response to global warming.
\emph{Science}, \bold{294}, 151-154.
}
\examples{
data(chamae2)
### wide version
chamae2w <- reshape(chamae2, direction = "wide", timevar = "varb",
    v.names = "resp", varying = list(levels(chamae2$varb)))
}
\keyword{datasets}