Spark mllib 列统计

val data_path = "file:///Users/walle/Documents/D3/sparkmlib/sample_stat.txt"
    val data = sc.textFile(data_path).map(_.split("\t")).map(f => f.map(f => f.toDouble))
    val data1 = data.map(f => Vectors.dense(f))
    val stat1 = Statistics.colStats(data1)
    stat1.max
    stat1.min
    stat1.mean
    stat1.variance
    stat1.normL1
    stat1.normL2