Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/11621#discussion_r58629672
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
---
@@ -777,10 +777,10 @@ sealed trait LogisticRegressionSummary extends
Serializable {
/** Dataframe outputted by the model's `transform` method. */
def predictions: DataFrame
- /** Field in "predictions" which gives the calibrated probability of
each instance as a vector. */
+ /** Field in "predictions" which gives the calibrated probability of
each class as a vector. */
def probabilityCol: String
- /** Field in "predictions" which gives the true label of each instance.
*/
+ /** Field in "predictions" which gives the true label of each instance
(if available). */
--- End diff --
I removed the "(if available)" from all other descriptions but this generic
trait because even in the `LinearRegressionSummary` class, for instance, it
assumes that a `labelCol` always exists so it can calculate the summary metrics.
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