Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/16729#discussion_r98760363
--- Diff: R/pkg/R/mllib_regression.R ---
@@ -53,12 +53,19 @@ setClass("IsotonicRegressionModel", representation(jobj
= "jobj"))
#' the result of a call to a family function. Refer R family
at
#'
\url{https://stat.ethz.ch/R-manual/R-devel/library/stats/html/family.html}.
#' Currently these families are supported: \code{binomial},
\code{gaussian},
-#' \code{Gamma}, and \code{poisson}.
+#' \code{Gamma}, \code{poisson} and \code{"tweedie"}.
+#' The tweedie family must be specified using character
string \code{"tweedie"}. The family
+#' function \code{tweedie} in the \code{statmod} package is
not supported.
--- End diff --
I prefer not having hard dependency on an external package in R, but if
statmod is present, could we support `family = tweedie` (not string) too?
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