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[SPARK-24300][ML] change the way to set seed in ml.cluster.LDASuite.generateLDAData #21492

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[SPARK-24300][ML] change the way to set seed in ml.cluster.LDASuite.generateLDAData #21492

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91fc116
change the way to generate the random seed in LDASuite
lu-wang-dl Jun 4, 2018
fa2c422
minnor fix for setting random seed
lu-wang-dl Jun 4, 2018
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4 changes: 2 additions & 2 deletions mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
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Expand Up @@ -36,9 +36,9 @@ object LDASuite {
vocabSize: Int): DataFrame = {
val avgWC = 1 // average instances of each word in a doc
val sc = spark.sparkContext
val rng = new java.util.Random()
rng.setSeed(1)
val rdd = sc.parallelize(1 to rows).map { i =>
val rng = new java.util.Random()
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@mengxr mengxr Jun 4, 2018

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minor: you can use new java.util.random(i) direct

rng.setSeed(i)
Vectors.dense(Array.fill(vocabSize)(rng.nextInt(2 * avgWC).toDouble))
}.map(v => new TestRow(v))
spark.createDataFrame(rdd)
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