R: Robust Line Fitting

line {eda}

R Documentation

Robust Line Fitting

Fit a line robustly as recommended in Exploratory Data Analysis.

line(x, y)

coef(object, ...)
residuals(object, type, ...)
fitted(object, ...)
print(x, digits = max(3, getOption("digits") - 3), ...)

`x,y`	the arguments can be any way of specifying x-y pairs.
`object`	a `tukeyline` object, typically the result of `line(*)`.
`digits`	number of significant digits to use, see `print`.
`type, ...`	potentially further arguments, required by generic.

An object of class "tukeyline".
Methods are available for the generic functions coef, residuals, fitted, and print.

Tukey, J. W. (1977). Exploratory Data Analysis, Reading Massachusetts: Addison-Wesley.

library(eda)
data(cars)
plot(cars)
(z <- line(cars))
abline(coef(z))
## Tukey-Anscombe Plot :
plot(residuals(z) ~ fitted(z), main = deparse(z$call))