R: Robust Line Fitting

line {eda} | R Documentation

## Robust Line Fitting

### Description

Fit a line robustly as recommended in Exploratory Data Analysis.

### Usage

    line(x, y)

    coef(object, ...)
    residuals(object, type, ...)
    fitted(object, ...)
    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))

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