On this Picostat.com statistics page, you will find information about the phosphor data set which pertains to Phosphorus Content Data. The phosphor data set is found in the robustbase R package. You can load the phosphor data set in R by issuing the following command at the console data("phosphor"). This will load the data into a variable called phosphor. If R says the phosphor data set is not found, you can try installing the package by issuing this command install.packages("robustbase") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the phosphor R data set. The size of this file is about 217 bytes.

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)

Format

A data frame with 18 observations on the following 3 variables.

inorg

Inorganic soil Phosphorus

organic

Organic soil Phosphorus

plant

Plant Phosphorus content

Source

P. J. Rousseeuw and A. M. Leroy (1987) 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")

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Dataset imported from https://www.r-project.org.