Returns a List of consecutive Doubles based on a start and end and a step value. Guarantees the end value is in the last double.

gistfile1.scala

def listOfConsecutivePairsInRange(start: Double, end: Double, step: Double = 1) = {
  val initialRange = start to end by step

  def splitIntoConsecutivePairs(xs: List[Double]):List[(Double,Double)] = {
    xs match {
      case x::y::Nil => {
        if (y != end) {
          List((x, end))
        } else {
          List((x, y))
        }
      }
      case x::y::ys => List((x,y)) ::: splitIntoConsecutivePairs(y::ys)
      case _ => Nil
    }
  }

  splitIntoConsecutivePairs(initialRange.toList)
}

// Example
listOfConsecutivePairsInRange(1000, 3000, 300)