if len(inputData) == 4:
      (speed, x, y, z) = inputData
    else:
      (speed, x, y) = inputData
    print len(inputData)
    print "Z: {}".format(z)
    coordinate = self.coordinateForPosition(x, y, z)
    radius = self.radiusForSpeed(speed)
    super(CartesianCoordinateEncoder, self).encodeIntoArray(
(coordinate, radius), output)