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\name{phosphor}
\alias{phosphor}
\docType{data}
\title{Phosphorus Content Data}
\description{
This dataset investigates the effect from inorganic and organic
Phosphorus in the soil upon the phosphorus content of the corn grown
in this soil, from Prescott (1975).
}
\usage{data(phosphor, package="robustbase")}
\format{
A data frame with 18 observations on the following 3 variables.
\describe{
\item{\code{inorg}}{Inorganic soil Phosphorus}
\item{\code{organic}}{Organic soil Phosphorus}
\item{\code{plant}}{Plant Phosphorus content}
}
}
\source{
P. J. Rousseeuw and A. M. Leroy (1987)
\emph{Robust Regression and Outlier Detection.} Wiley, p.156, table 24.
}
\examples{
data(phosphor)
plot(phosphor)
summary(lm.phosphor <- lm(plant ~ ., data = phosphor))
summary(lts.phosphor <- ltsReg(plant ~ ., data = phosphor))
phosphor.x <- data.matrix(phosphor[, 1:2])
cPh <- covMcd(phosphor.x)
plot(cPh, "dd")
}
\keyword{datasets}
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