Github user jkbradley commented on a diff in the pull request: https://github.com/apache/spark/pull/2604#discussion_r18262076 --- Diff: examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRunner.scala --- @@ -170,16 +176,40 @@ object DecisionTreeRunner { val frac = classCounts(c) / numExamples.toDouble println(s"$c\t$frac\t${classCounts(c)}") } - (examples, numClasses) + (examples, classIndexMap, numClasses) } case Regression => - (origExamples, 0) + (origExamples, null, 0) case _ => throw new IllegalArgumentException("Algo ${params.algo} not supported.") } - // Split into training, test. - val splits = examples.randomSplit(Array(1.0 - params.fracTest, params.fracTest)) + // Create training, test sets. + val splits = if (params.testInput != "") { --- End diff -- I agree, it should, but I'd like to wait for another PR if that's OK.
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