stats (version 3.3)

line: Robust Line Fitting

Description

Fit a line robustly as recommended in Exploratory Data Analysis.

Usage

line(x, y)

Arguments

x, y

the arguments can be any way of specifying x-y pairs. See xy.coords.

Value

• An object of class "tukeyline".

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

Details

Cases with missing values are omitted.

Long vectors are not supported.

References

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

See Also

lm.

Examples

require(graphics)

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