over_ratio: Parameters for class-imbalance sampling

In dials: Tools for Creating Tuning Parameter Values

Parameters for class-imbalance sampling

Description

For up- and down-sampling methods, these parameters control how much data are added or removed from the training set. Used in themis::step_rose(), themis::step_smotenc(), themis::step_bsmote(), themis::step_upsample(), themis::step_downsample(), and themis::step_nearmiss().

Usage

over_ratio(range = c(0.8, 1.2), trans = NULL)

under_ratio(range = c(0.8, 1.2), trans = NULL)

Arguments

range	A two-element vector holding the defaults for the smallest and largest possible values, respectively. If a transformation is specified, these values should be in the transformed units.
trans	A trans object from the scales package, such as scales::transform_log10() or scales::transform_reciprocal(). If not provided, the default is used which matches the units used in range. If no transformation, NULL.

Examples

under_ratio()
over_ratio()

dials documentation built on Aug. 9, 2025, 1:06 a.m.