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MulticlassClassificationMetrics.LogLossReduction Property

  • Reference

Definition

Namespace:
Microsoft.ML.Data
Assembly:
Microsoft.ML.Data.dll
Package:
Microsoft.ML v3.0.1
Package:
Microsoft.ML v1.0.0
Package:
Microsoft.ML v1.1.0
Package:
Microsoft.ML v1.2.0
Package:
Microsoft.ML v1.3.1
Package:
Microsoft.ML v1.4.0
Package:
Microsoft.ML v1.5.5
Package:
Microsoft.ML v1.6.0
Package:
Microsoft.ML v1.7.0
Package:
Microsoft.ML v2.0.0

Gets the log-loss reduction (also known as relative log-loss, or reduction in information gain - RIG) of the classifier. It gives a measure of how much a model improves on a model that gives random predictions. Log-loss reduction closer to 1 indicates a better model.

public double LogLossReduction { get; }
member this.LogLossReduction : double
Public ReadOnly Property LogLossReduction As Double

Property Value

Double

Remarks

The log-loss reduction is scaled relative to a classifier that predicts the prior for every example: $LogLossReduction = \frac{LogLoss(prior) - LogLoss(classifier)}{LogLoss(prior)}$ This metric can be interpreted as the advantage of the classifier over a random prediction. For example, if the RIG equals 0.2, it can be interpreted as "the probability of a correct prediction is 20% better than random guessing".

Applies to