Github user MLnick commented on a diff in the pull request:
https://github.com/apache/spark/pull/13924#discussion_r68920293
--- Diff: docs/mllib-guide.md ---
@@ -104,9 +104,87 @@ and the migration guide below will explain all changes
between releases.
## From 1.6 to 2.0
-The deprecations and changes of behavior in the `spark.mllib` or
`spark.ml` packages include:
+### Breaking changes
-Deprecations:
+There were several breaking changes in Spark 2.0, which are outlined below.
+
+**Linear algebra classes for DataFrame-based APIs**
+
+Spark's linear algebra dependencies were moved to a new project,
`spark-mllib-local`
+(see [SPARK-13944](https://issues.apache.org/jira/browse/SPARK-13944)).
+As part of this change, the linear algebra classes were moved to a new
package, `spark.ml.linalg`.
+The DataFrame-based APIs in `spark.ml` now depend on the `spark.ml.linalg`
classes,
+leading to a few breaking changes, predominantly in various model classes
+(see [SPARK-14810](https://issues.apache.org/jira/browse/SPARK-14810) for
a full list).
+
+**Note:** the RDD-based APIs in `spark.mllib` continue to depend on the
previous package `spark.mllib.linalg`.
+
+_Converting vectors and matrices_
--- End diff --
Good point - though I only see `asML` not `fromML`?
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