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Robust Line Fitting
Usage
line(x, y)
coefficients(tukeyline.obj)
residuals(tukeyline.obj)
fitted.values(tukeyline.obj)
print(tukeyline.obj)
Arguments
x,y
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the arguments can be any way of specifying x-y pairs.
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Description
This function fits a line robustly as recommended in John Tukey's
book Exploratory Data Analysis.
Value
An object of class tukeyline. Methods are available
for the generic functions coefficients, residuals,
fitted.values 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))