getStartIC
computes the optimally-robust IC to be used as
argument ICstart
in kStepEstimator
.
getStartIC(model, risk, ...)
# S4 method for L2ScaleShapeUnion,interpolRisk
getStartIC(model, risk, ...,
withMakeIC = FALSE, ..debug=FALSE, modifyICwarn = NULL)
# S4 method for L2LocScaleShapeUnion,interpolRisk
getStartIC(model, risk, ...,
withMakeIC = FALSE, ..debug=FALSE, modifyICwarn = NULL)
# S4 method for ParetoFamily,interpolRisk
getStartIC(model, risk, ...,
withMakeIC = FALSE)
normtype of class NormType
normtype of class NormType
further arguments to be passed to specific methods.
logical; if TRUE
the IC is passed through
makeIC
before return.
logical; if TRUE
information for debugging is issued.
logical: should a (warning) information be added if
modifyIC
is applied and hence some optimality information could
no longer be valid? Defaults to NULL
in which case this value
is taken from RobAStBaseOptions
.
An IC of type HampIC
.
signature(model = "L2ScaleShapeUnion", risk = "interpolRisk")
:
computes the optimally robust influence function by interpolation
on a grid (using internal helper function .getPsi
).
signature(model = "L2LocScaleShapeUnion", risk = "interpolRisk")
:
computes the optimally robust influence function by interpolation
on a grid (using internal helper function .getPsi.wL
).
signature(model = "ParetoFamily", risk = "interpolRisk")
:
computes the optimally robust influence function by interpolation
on a grid (using internal helper function .getPsi.P
).
All of these methods recenter and restandardize the obtained ICs to warrant centeredness and Fisher consistency.
getStartIC
is used internally in functions robest
and roptest
to compute the optimally robust influence function
according to the arguments given to them.