phosphor {robustbase} | R Documentation |
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).
data(phosphor)
A data frame with 18 observations on the following 3 variables.
inorg
organic
plant
P. J. Rousseeuw and A. M. Leroy (1987) Robust Regression and Outlier Detection. Wiley, p.156, table 24.
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")