I solve the question with this code:
import org.apache.spark.mllib.clustering.KMeans
import org.apache.spark.mllib.linalg.Vectors
val data = sc.textFile("/opt/testAppSpark/data/height-weight.txt").map {
line => Vectors.dense(line.split(' ').map(_.toDouble))
}.cache()
val cluster = KMeans.train(data, 3, 20)
val vectorsAndClusterIdx = data.map{ point =>
val prediction = cluster.predict(point)
(point.toString, prediction)
}
vectorsAndClusterIdx.collect
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