kumulant
kumulant/com.eignex.kumulant.stat.regression.tree/ClassificationSplitMetric

ClassificationSplitMetric

@Serializable
sealed interface ClassificationSplitMetric(source)

Classification analogue of SplitMetric: scores a candidate split using the leaf's per-class counts. Higher is better; returns 0 when the split has no signal (one side empty, or zero impurity reduction).

Ships GiniReduction and InformationGain only; other criteria can land here when consumers ask for them.

Inheritors

Functions

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abstract fun score(total: ClassCountsResult, pos: ClassCountsResult, neg: ClassCountsResult): Double

Score a candidate split given the leaf's total / pos / neg class counts.

score

abstract fun score(total: ClassCountsResult, pos: ClassCountsResult, neg: ClassCountsResult): Double(source)

Score a candidate split given the leaf's total / pos / neg class counts.