The R Project SVN R

\name{longley}
\alias{longley}
\title{Longley's Regression Data}
\usage{data(longley)}
\source{
    J. W. Longley (1967).
    An appraisal of least-squares programs from the point of view of the
    user.
    \emph{Journal of the American Statistical Association} \bold{62},
    819--841.}
\format{A data frame with 7 economical variables, observed yearly
    from 1947 to 1962 (\eqn{n=16}).

    \tabular{rl}{
        GNP.deflator: \tab GNP implicit price deflator (\eqn{1954=100})\cr
        GNP:          \tab Gross National Producr.\cr
        Unemployed:   \tab number of unemployed \cr
        Armed.Forces: \tab number of .. in the armed forces\cr
        Population:   \tab `noninstitutionalized' population\cr
                  \tab \eqn{\ge} 14 years of age.\cr 
        Year:         \tab the year (time).\cr
        Employed:     \tab number of people employed.
    }

    The regression \code{lm(Employed ~ .)} is known to be highly
    collinear.
}
\examples{
# give the data set in the form it is used in S-plus:
data(longley)
longley.x <- data.matrix(longley[, 1:6])
longley.y <- longley[, "Employed"]
}
\keyword{datasets}