pub fn formaldehyde() -> Result<DataFrame, PolarsError>Expand description
§Determination of Formaldehyde
§Description:
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.
§Usage:
Formaldehyde
§Format:
A data frame with 6 observations on 2 variables.
- [,1] carb numeric Carbohydrate (ml)
- [,2] optden numeric Optical Density
§Source:
Bennett, N. A. and N. L. Franklin (1954) Statistical Analysis in Chemistry and the Chemical Industry. New York: Wiley.
§References:
McNeil, D. R. (1977) Interactive Data Analysis. New York: Wiley.
§Examples:
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))
summary(fm1)
opar <- par(mfrow = c(2, 2), oma = c(0, 0, 1.1, 0))
plot(fm1)
par(opar)