Github user crackcell commented on a diff in the pull request:
https://github.com/apache/spark/pull/17233#discussion_r105820314
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala ---
@@ -188,35 +189,45 @@ class StringIndexerModel (
transformSchema(dataset.schema, logging = true)
val filteredLabels = getHandleInvalid match {
- case StringIndexer.KEEP_UNSEEN_LABEL => labels :+ "__unknown"
+ case StringIndexer.KEEP_INVALID => labels :+ "__unknown"
case _ => labels
}
val metadata = NominalAttribute.defaultAttr
.withName($(outputCol)).withValues(filteredLabels).toMetadata()
// If we are skipping invalid records, filter them out.
val (filteredDataset, keepInvalid) = getHandleInvalid match {
- case StringIndexer.SKIP_UNSEEN_LABEL =>
+ case StringIndexer.SKIP_INVALID =>
val filterer = udf { label: String =>
labelToIndex.contains(label)
}
- (dataset.where(filterer(dataset($(inputCol)))), false)
- case _ => (dataset, getHandleInvalid ==
StringIndexer.KEEP_UNSEEN_LABEL)
+
(dataset.na.drop(Array($(inputCol))).where(filterer(dataset($(inputCol)))),
false)
+ case _ => (dataset, getHandleInvalid == StringIndexer.KEEP_INVALID)
}
- val indexer = udf { label: String =>
- if (labelToIndex.contains(label)) {
- labelToIndex(label)
- } else if (keepInvalid) {
- labels.length
+ val indexer = udf { row: Row =>
--- End diff --
got it
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