bfunc {bst} | R Documentation |
Compute upper bound of second derivative of loss
Description
Compute upper bound of second derivative of loss.
Usage
bfunc(family, s)
Arguments
family |
a family from "closs", "gloss", "qloss" for classification and "clossR" for robust regression. |
s |
a parameter related to robustness. |
Details
A finite upper bound is required in quadratic majorization.
Value
A positive number.
Author(s)
Zhu Wang
[Package bst version 0.3-24 Index]