Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/17715#discussion_r114030627
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
---
@@ -178,11 +178,86 @@ private[classification] trait
LogisticRegressionParams extends ProbabilisticClas
}
}
+ /**
+ * The lower bounds on 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.
+ *
--- End diff --
We should state the default value is none
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