Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/3833#discussion_r23821623
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
---
@@ -37,11 +40,26 @@ class LogisticRegressionModel (
private var threshold: Option[Double] = Some(0.5)
+ private var nClasses = 2
+
/**
* :: Experimental ::
- * Sets the threshold that separates positive predictions from negative
predictions. An example
- * with prediction score greater than or equal to this threshold is
identified as an positive,
- * and negative otherwise. The default value is 0.5.
+ * Set the number of possible outcomes for k classes classification
problem in
+ * Multinomial Logistic Regression.
+ * By default, it is binary logistic regression so k will be set to 2.
+ */
+ @Experimental
+ def setNumOfClasses(k: Int): this.type = {
--- End diff --
Remove this setter.
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