Github user jodersky commented on the pull request:
https://github.com/apache/spark/pull/10337#issuecomment-165292856
I'm running the code snippet from the original JIRA:
```scala
import org.apache.spark.ml.feature.VectorAssembler
val df = sc.parallelize(List((1,2), (3,4))).toDF
val assembler = new VectorAssembler().setInputCols(Array("_1",
"_2")).setOutputCol("features")
assembler.transform(df).show
```
in the spark shell spawned from the sbt `sparkShell` task
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