Github user dbtsai commented on a diff in the pull request:
https://github.com/apache/spark/pull/10743#discussion_r49955604
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
---
@@ -883,6 +884,27 @@ class LogisticRegressionSuite
assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
}
+ test("logistic regression with fitIntercept=true and all labels the
same") {
+ val lr = new LogisticRegression()
+ .setFitIntercept(true)
+ .setMaxIter(3)
+ val sameLabels = dataset
+ .withColumn("zeroLabel", lit(0.0))
+ .withColumn("oneLabel", lit(1.0))
+
+ val allZeroModel = lr
+ .setLabelCol("zeroLabel")
+ .fit(sameLabels)
+ assert(allZeroModel.coefficients ~== Vectors.dense(0.0) absTol 1E-3)
+ assert(allZeroModel.intercept === Double.NegativeInfinity)
+
+ val allOneModel = lr
+ .setLabelCol("oneLabel")
+ .fit(sameLabels)
+ assert(allOneModel.coefficients ~== Vectors.dense(0.0) absTol 1E-3)
+ assert(allOneModel.intercept === Double.PositiveInfinity)
+ }
+
--- End diff --
Can you add one test which is all labels the same but `fitIntercept=false`
here to avoid the issue in LiR? Thanks.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
