小编raw*_*evo的帖子

我想检查每个列表中是否存在值.

以下True按预期返回,但似乎不是pythonic.

这样做的正确/更优雅的方法是什么？

a = [1 ,2]
b = [1, 3]
c = [1, 4]
d = [2, 5]

False in [True if 1 in l else False for l in [a, b, c, d]  ]

我正在为Flink运行示例多元线性回归(0.10-SNAPSHOT).我无法弄清楚如何提取权重(例如斜率和截距,beta0-beta1,你想要称之为什么).我不是斯卡拉的超级经验,这可能是我的问题的一半.

感谢任何人给予的任何帮助.

object Job {
 def main(args: Array[String]) {
    // set up the execution environment
    val env = ExecutionEnvironment.getExecutionEnvironment

    val survival = env.readCsvFile[(String, String, String, String)]("/home/danger/IdeaProjects/quickstart/docs/haberman.data")

    val survivalLV = survival
      .map{tuple =>
      val list = tuple.productIterator.toList
      val numList = list.map(_.asInstanceOf[String].toDouble)
      LabeledVector(numList(3), DenseVector(numList.take(3).toArray))
    }

    val mlr = MultipleLinearRegression()
      .setStepsize(1.0)
      .setIterations(100)
      .setConvergenceThreshold(0.001)

    mlr.fit(survivalLV) 
    println(mlr.toString())     // This doesn't do anything productive...
    println(mlr.weightsOption)  // Neither does this.

  }
}