srowen commented on a change in pull request #24717: [SPARK-27847][ML] One-Pass
MultilabelMetrics & MulticlassMetrics
URL: https://github.com/apache/spark/pull/24717#discussion_r287791954
##########
File path:
mllib/src/main/scala/org/apache/spark/mllib/evaluation/MultilabelMetrics.scala
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@@ -179,3 +167,160 @@ class MultilabelMetrics @Since("1.2.0")
(predictionAndLabels: RDD[(Array[Double]
@Since("1.2.0")
lazy val labels: Array[Double] = tpPerClass.keys.toArray.sorted
}
+
+
+/**
+ * Trait for statistical summary for multi-label metrics.
+ */
+private[evaluation] trait MultilabelSummary {
Review comment:
Is there much value in splitting the trait and implementation? it's private
and used in one place.
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