getScores.scala

  private def getScores(doc: String): Array[Double] = {
      // Helper function used to normalize probability scores.
      // Returns an object of type Array[Double]

      // Vectorize query,
      val x: Vector = pd.transform(doc)

      val z = scoreArray
        .map(e => innerProduct(e._2, x.toArray) + e._1)

      normalize((0 until z.size).map(k => exp(abs(z.max) + z(k))).toArray)
  }