Github user actuaryzhang commented on a diff in the pull request:
https://github.com/apache/spark/pull/16344#discussion_r94849501
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/regression/GeneralizedLinearRegression.scala
---
@@ -158,6 +183,16 @@ class GeneralizedLinearRegression @Since("2.0.0")
(@Since("2.0.0") override val
setDefault(family -> Gaussian.name)
/**
+ * Sets the value of param [[variancePower]].
+ * Used only when family is "tweedie".
+ *
+ * @group setParam
+ */
+ @Since("2.2.0")
+ def setVariancePower(value: Double): this.type = set(variancePower,
value)
+ setDefault(variancePower -> 1.5)
--- End diff --
Done. change default variancePower to 0.0, which will use Gaussian (with
default identity link)
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