line {eda}

R Documentation

Robust Line Fitting

Description

Fit a line robustly as recommended in Exploratory Data Analysis.

Usage

line(x, y)



## S3 method for class 'tukeyline'
coef(object, ...)
## S3 method for class 'tukeyline'
residuals(object, type, ...)
## S3 method for class 'tukeyline'
fitted(object, ...)
## S3 method for class 'tukeyline'
print(x, digits = max(3, getOption("digits") - 3), ...)

Arguments

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.

Value

An object of class "tukeyline".

Methods are available for the generic functions coef, residuals, fitted, and print.

References

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

See Also

lm.

Examples

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