R Dataset / Package datasets / Formaldehyde

Attachment Size
dataset-91017.csv 76 bytes
Dataset License
GNU General Public License v2.0
Documentation License
GNU General Public License v2.0

On this Picostat.com statistics page, you will find information about the Formaldehyde data set which pertains to Determination of Formaldehyde. The Formaldehyde data set is found in the datasets R package. You can load the Formaldehyde data set in R by issuing the following command at the console data("Formaldehyde"). This will load the data into a variable called Formaldehyde. If R says the Formaldehyde data set is not found, you can try installing the package by issuing this command install.packages("datasets") 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 Formaldehyde R data set. The size of this file is about 76 bytes.

Determination of Formaldehyde


These data are from a chemical experiment to prepare a standard curve for the determination of formaldehyde by the addition of chromatropic acid and concentrated sulphuric acid and the reading of the resulting purple color on a spectrophotometer.




A data frame with 6 observations on 2 variables.

[,1] carb numeric Carbohydrate (ml)
[,2] optden numeric Optical Density


Bennett, N. A. and N. L. Franklin (1954) Statistical Analysis in Chemistry and the Chemical Industry. New York: Wiley.


McNeil, D. R. (1977) Interactive Data Analysis. New York: Wiley.


require(stats); require(graphics)
plot(optden ~ carb, data = Formaldehyde,
     xlab = "Carbohydrate (ml)", ylab = "Optical Density",
     main = "Formaldehyde data", col = 4, las = 1)
abline(fm1 <- lm(optden ~ carb, data = Formaldehyde))
opar <- par(mfrow = c(2, 2), oma = c(0, 0, 1.1, 0))

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

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