plotuScree.Rd
\name{plotuScree}
\alias{plotuScree}

\title{ Plot of the Usual Cattell's Scree Test }

\description{
\code{uScree} plot a usual scree test of the eigenvalues of a correlation matrix.
}

\usage{
plotuScree(Eigenvalue,
x      = Eigenvalue,
model  = "components",
ylab   = "Eigenvalues",
xlab   = "Components",
main   = "Scree Plot",
...
)
}

\arguments{
\item{Eigenvalue}{depreciated parameter: eigenvalues to analyse (not used if
x is used, recommended) }
\item{x}{         numeric: a \code{vector} of eigenvalues, a \code{matrix} of
correlations or of covariances or a \code{data.frame} of data}
\item{model}{     character: \code{"components"} or \code{"factors"} }
\item{main}{      character: title of the plot   (default is \code{Scree Plot})      }
\item{xlab}{      character: label of the x axis (default is \code{Component})  }
\item{ylab}{      character: label of the y axis (default is \code{Eigenvalue}) }
\item{...}{       variable: additionnal parameters to give to the \code{eigenComputes} function}
}

\value{
Nothing returned with this function.
}

\references{
Cattell, R. B. (1966). The scree test for the number of factors.
\emph{Multivariate Behavioral Research, 1}, 245-276.
}

\seealso{
}

\author{
Gilles Raiche \cr
Centre sur les Applications des Modeles de Reponses aux Items (CAMRI) \cr
Universite du Quebec a Montreal\cr
\email{raiche.gilles@uqam.ca}, \url{http://www.er.uqam.ca/nobel/r17165/}
}

\examples{
## SCREE PLOT
data(dFactors)
attach(dFactors)
eig = Cliff1\$eigenvalues
plotuScree(x=eig)
}

\keyword{ Graphics }