computes the robust Final Prediction Errors (FPE) for a robust
regression fit using M-estimates.
USAGE:
lmRob.RFPE(object, scale=NULL)
REQUIRED ARGUMENTS:
object
an object of class
lmRob.
OPTIONAL ARGUMENTS:
scale
a scale estimate used to compute the robust FPE. Usually this should
be the scale estimate from an encompassing model. If it is
NULL, the scale estimate in
object is used.