scala - 如何在scala中打印Map[String, Array[Float]]？

Question

我正在使用 Spark 的 mllib 库中的 word2vec 函数。我想打印我作为“getVectors”函数的输出得到的词向量我的代码如下所示:

import org.apache.spark._

import org.apache.spark.rdd._
import org.apache.spark.SparkContext._
import org.apache.spark.mllib.feature.{Word2Vec, Word2VecModel}

object word2vec {
  def main(args: Array[String]) {
    val conf = new SparkConf().setAppName("word2vec")
    val sc = new SparkContext(conf)
    val input = sc.textFile("file:///home/snap-01/balance.csv").map(line => line.split(",").toSeq)
    val word2vec = new Word2Vec()
    val model = word2vec.fit(input)
    model.save(sc, "myModelPath")
    val sameModel = Word2VecModel.load(sc, "myModelPath")
    val vec = sameModel.getVectors
    print(vec)
  }
}

我收到“ map (余额 -> [F@2932e15f)”

Answer 1

试试这个:

vec.foreach { case (key, values) => println("key " + key + " - " + values.mkString("-"))
}