坐标曲线在各种统计图中应该算比较难画的，主要是很难将坐标值与图中的位置对应起来.本文给出了坐标曲线的编程实现-Coordinate curve in a variety of charts that should be regarded as relatively difficult to draw, mainly it is difficult to value and map coordinates of the location of the corresponding up. In this paper, the coordinate curves Programming is given.