Github user dbtsai commented on a diff in the pull request:
https://github.com/apache/spark/pull/17715#discussion_r113042111
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
---
@@ -178,6 +179,68 @@ private[classification] trait LogisticRegressionParams
extends ProbabilisticClas
}
}
+ /**
+ * The lower bound of coefficients if fitting under bound constrained
optimization.
+ * The bound matrix must be compatible with the shape (1, number of
features) for binomial
+ * regression, or (number of classes, number of features) for
multinomial regression.
+ * Otherwise, it throws exception.
+ *
+ * @group param
+ */
+ @Since("2.2.0")
+ val lowerBoundOfCoefficients: Param[Matrix] = new Param(this,
"lowerBoundOfCoefficients",
--- End diff --
`lowerBoundsOnCoefficients`
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