Use update() on an lmRob Object

DESCRIPTION:

This is a method for the function update() for objects inheriting from class lmRob. See update for the general behavior of this function and for the interpretation of the arguments.

USAGE:

update.lmRob(object, formula, evaluate=T, class, ...) 

DETAILS:

If formula is missing, update.lmRob alternates between the initial estimates and final estimates. If formula is present, update.lmRob functions just like update.default.

REFERENCES:

Gervini, D., and Yohai, V. J. (1999). A class of robust and fully efficient regression estimates, mimeo, Universidad de Buenos Aires.

Yohai, V., Stahel, W. A., and Zamar, R. H. (1991): A procedure for robust estimation and inference in linear regression, in Stahel, W. A. and Weisberg, S. W., Eds., Directions in robust statistics and diagnostics, Part II. Springer-Verlag, New York.

SEE ALSO:

.

EXAMPLES:

# Alternates between initial and final estimates
stack.df <- data.frame(Loss=stack.loss,stack.x) 
stack.final <- lmRob(Loss~Air.Flow+Water.Temp+Acid.Conc., data=stack.df) 
stack.initial <- update(stack.final)