画曲线图工具，对于需要写文章画图，这是一个相当不错的工具，输入坐标值，绘画出漂亮的曲线图，省却自己取点的麻烦！-Painting curve tools, need to write articles for the drawing, this is a pretty good tool, enter the coordinates, painting a beautiful curve, save themselves the trouble of check points!

一款自绘曲线源码。包括坐标系，图例，网格线，等等(A drawing curve source code. Including coordinate systems, legends, mesh lines, and so on)