df.describe().rdd.map{ case r : Row => (r.getAs[String](“summary”),r) }.filter(_._1 == “mean”).map(_._2).first().toSeq.drop(1).map(x => x.toString().toDouble)
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df.describe().rdd.map{ case r : Row => (r.getAs[String](“summary”),r) }.filter(_._1 == “mean”).map(_._2).first().toSeq.drop(1).map(x => x.toString().toDouble)