[SPARK-12597] [ML] Use udf to replace callUDF for ML #10544
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callUDFhas been deprecated and will be removed in Spark 2.0. We should replace the use ofcallUDFwithudffor ML.I was trying to directly wrap
createTransformFunctoudf(which was illustrated by the following code snippet) as an initial attempt, but it hits a bug ofTypeTag ... NotSerializableExceptionwhich exists at Scala 2.10.