Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/16344#discussion_r93773858
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/regression/GeneralizedLinearRegression.scala
---
@@ -128,13 +151,14 @@ private[regression] trait
GeneralizedLinearRegressionBase extends PredictorParam
* Generalized linear model (Wikipedia)</a>)
* specified by giving a symbolic description of the linear
* predictor (link function) and a description of the error distribution
(family).
- * It supports "gaussian", "binomial", "poisson" and "gamma" as family.
+ * It supports "gaussian", "binomial", "poisson", "gamma" and "tweedie" as
family.
* Valid link functions for each family is listed below. The first link
function of each family
* is the default one.
* - "gaussian" : "identity", "log", "inverse"
* - "binomial" : "logit", "probit", "cloglog"
* - "poisson" : "log", "identity", "sqrt"
* - "gamma" : "inverse", "identity", "log"
+ * - "tweedie" : "identity", "log"
--- End diff --
```- "tweedie" : "log", "identity"```, see L155: ```the first link
function of each family is the default one```.
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