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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