groupdiff_tau {mlr3fairness}

Groupwise Operations

Description

groupdiff_tau() computes min(x/y, y/x), i.e. the smallest symmetric ratio between x and eqny that is smaller than 1. If x is a vector, the symmetric ratio between all elements in x is computed.

groupdiff_absdiff() computes max(abs(x-y, y-x)), i.e. the smallest absolute difference between x and y. If x is a vector, the symmetric absolute difference between all elements in x is computed.

Usage

groupdiff_tau(x)

groupdiff_absdiff(x)

groupdiff_diff(x)

Arguments

x

(numeric())
Measured performance in group 1, 2, ...

Value

A single numeric.

Protected Attributes

The protected attribute is specified as a col_role in the corresponding Task():
⁠<Task>$col_roles$pta = "name_of_attribute"⁠
This also allows specifying more than one protected attribute, in which case fairness will be considered on the level of intersecting groups defined by all columns selected as a predicted attribute.

Examples

groupdiff_tau(1:3)
groupdiff_diff(1:3)
groupdiff_absdiff(1:3)