RobAStBase: getRiskIC – R documentation

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RobAStBase

getRiskIC

Generic function for the computation of a risk for an IC

Description

Generic function for the computation of a risk for an IC.

Usage

getRiskIC(IC, risk, neighbor, L2Fam, ...)

## S4 method for signature 'IC,asCov,missing,missing'
getRiskIC(IC, risk,
    tol = .Machine$double.eps^0.25, withCheck = TRUE, ...)

## S4 method for signature 'IC,asCov,missing,L2ParamFamily'
getRiskIC(IC, risk, L2Fam,
    tol = .Machine$double.eps^0.25, withCheck = TRUE, ..., diagnostic = FALSE)

## S4 method for signature 'IC,trAsCov,missing,missing'
getRiskIC(IC, risk,
    tol = .Machine$double.eps^0.25, withCheck = TRUE, ...)

## S4 method for signature 'IC,trAsCov,missing,L2ParamFamily'
getRiskIC(IC, risk, L2Fam,
    tol = .Machine$double.eps^0.25, withCheck = TRUE, ...)

## S4 method for signature 'IC,asBias,UncondNeighborhood,missing'
getRiskIC(IC, risk, neighbor,
    tol = .Machine$double.eps^0.25, withCheck = TRUE, ...)

## S4 method for signature 'IC,asBias,UncondNeighborhood,L2ParamFamily'
getRiskIC(IC, risk, neighbor, L2Fam,
    tol = .Machine$double.eps^0.25, withCheck = TRUE, ...)

## S4 method for signature 'IC,asMSE,UncondNeighborhood,missing'
getRiskIC(IC, risk, neighbor,
    tol = .Machine$double.eps^0.25, withCheck = TRUE, ...)

## S4 method for signature 'IC,asMSE,UncondNeighborhood,L2ParamFamily'
getRiskIC(IC, risk, neighbor, L2Fam,
    tol = .Machine$double.eps^0.25, withCheck = TRUE, ...)

## S4 method for signature 'TotalVarIC,asUnOvShoot,UncondNeighborhood,missing'
getRiskIC(IC, risk, neighbor)

## S4 method for signature 'IC,fiUnOvShoot,ContNeighborhood,missing'
getRiskIC(IC, risk, neighbor, sampleSize, Algo = "A", cont = "left")

## S4 method for signature 'IC,fiUnOvShoot,TotalVarNeighborhood,missing'
getRiskIC(IC, risk, neighbor, sampleSize, Algo = "A", cont = "left")

Arguments

`IC`	object of class `"InfluenceCurve"`
`risk`	object of class `"RiskType"`.
`neighbor`	object of class `"Neighborhood"`.
`L2Fam`	object of class `"L2ParamFamily"`.
`...`	additional parameters (e.g. to be passed to `E`).
`tol`	the desired accuracy (convergence tolerance).
`sampleSize`	integer: sample size.
`Algo`	"A" or "B".
`cont`	"left" or "right".
`withCheck`	logical: should a call to `checkIC` be done to check accuracy (defaults to `TRUE`).
`diagnostic`	logical; if `TRUE`, the return value obtains an attribute `"diagnostic"` with diagnostic information on the integration.

Details

To make sure that the results are valid, it is recommended to include an additional check of the IC properties of IC using checkIC.

Value

The risk of an IC is computed.

Methods

IC = "IC", risk = "asCov", neighbor = "missing", L2Fam = "missing": asymptotic covariance of IC.
IC = "IC", risk = "asCov", neighbor = "missing", L2Fam = "L2ParamFamily": asymptotic covariance of IC under L2Fam.
IC = "IC", risk = "trAsCov", neighbor = "missing", L2Fam = "missing": asymptotic covariance of IC.
IC = "IC", risk = "trAsCov", neighbor = "missing", L2Fam = "L2ParamFamily": asymptotic covariance of IC under L2Fam.
IC = "IC", risk = "asBias", neighbor = "ContNeighborhood", L2Fam = "missing": asymptotic bias of IC under convex contaminations; uses method getBiasIC.
IC = "IC", risk = "asBias", neighbor = "ContNeighborhood", L2Fam = "L2ParamFamily": asymptotic bias of IC under convex contaminations and L2Fam; uses method getBiasIC.
IC = "IC", risk = "asBias", neighbor = "TotalVarNeighborhood", L2Fam = "missing": asymptotic bias of IC in case of total variation neighborhoods; uses method getBiasIC.
IC = "IC", risk = "asBias", neighbor = "TotalVarNeighborhood", L2Fam = "L2ParamFamily": asymptotic bias of IC under L2Fam in case of total variation neighborhoods; uses method getBiasIC.
IC = "IC", risk = "asMSE", neighbor = "UncondNeighborhood", L2Fam = "missing": asymptotic mean square error of IC.
IC = "IC", risk = "asMSE", neighbor = "UncondNeighborhood", L2Fam = "L2ParamFamily": asymptotic mean square error of IC under L2Fam.
IC = "TotalVarIC", risk = "asUnOvShoot", neighbor = "UncondNeighborhood", L2Fam = "missing": asymptotic under-/overshoot risk of IC.
IC = "IC", risk = "fiUnOvShoot", neighbor = "ContNeighborhood", L2Fam = "missing": finite-sample under-/overshoot risk of IC.
IC = "IC", risk = "fiUnOvShoot", neighbor = "TotalVarNeighborhood", L2Fam = "missing": finite-sample under-/overshoot risk of IC.

Note

This generic function is still under construction.

Author(s)

Matthias Kohl Matthias.Kohl@stamats.de
Peter Ruckdeschel peter.ruckdeschel@uni-oldenburg.de

References

Huber, P.J. (1968) Robust Confidence Limits. Z. Wahrscheinlichkeitstheor. Verw. Geb. 10:269–278.

Rieder, H. (1980) Estimates derived from robust tests. Ann. Stats. 8: 106–115.

Rieder, H. (1994) Robust Asymptotic Statistics. New York: Springer.

Kohl, M. (2005) Numerical Contributions to the Asymptotic Theory of Robustness. Bayreuth: Dissertation.

Ruckdeschel, P. and Kohl, M. (2005) Computation of the Finite Sample Risk of M-estimators on Neighborhoods.