cp_four.swift

func configurePlot(){
      plot = CPTScatterPlot()
      let plotLineStile = CPTMutableLineStyle()
      plotLineStile.lineJoin = .round
      plotLineStile.lineCap = .round
      plotLineStile.lineWidth = 2
      plotLineStile.lineColor = CPTColor.white()
      plot.dataLineStyle = plotLineStile
      plot.curvedInterpolationOption = .catmullCustomAlpha
      plot.interpolation = .curved
      plot.identifier = "coreplot-graph" as NSCoding & NSCopying & NSObjectProtocol
      guard let graph = hostView.hostedGraph else { return }
      plot.dataSource = (self as CPTPlotDataSource)
      plot.delegate = (self as CALayerDelegate)
      graph.add(plot, to: graph.defaultPlotSpace)
  }