Github user badriub commented on a diff in the pull request:
https://github.com/apache/spark/pull/7652#discussion_r35773166
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/OneVsRest.scala ---
@@ -127,10 +128,16 @@ final class OneVsRestModel private[ml] (
predictions.maxBy(_._2)._1.toDouble
}
+ // output the index of the classifier with highest confidence as
prediction
+ val probabilityUDF = udf { (predictions: Map[Int, Double]) =>
+ predictions.maxBy(_._2)._2.toDouble
+ }
+
// output label and label metadata as prediction
aggregatedDataset
.withColumn($(predictionCol),
labelUDF(col(accColName)).as($(predictionCol), labelMetadata))
- .drop(accColName)
+ .withColumn($(rawPredictionCol),
probabilityUDF(col(accColName)).as($(rawPredictionCol),
+ labelMetadata)).drop(accColName)
}
--- End diff --
Adding the max confidence factor as output column.
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