[SPARK-15363][ML][Example]:Example code shouldn't use VectorImplicits._, asML/fromML #13213
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What changes were proposed in this pull request?
(Please fill in changes proposed in this fix)
In this DataFrame example, we use VectorImplicits._, which is private API.
Since Vectors object has public API, we use Vectors.fromML instead of implicts.
How was this patch tested?
(Please explain how this patch was tested. E.g. unit tests, integration tests, manual tests)
Manually run the example.