最小二乘法进行执行拟合小程序，只要输入一系列（大于2个坐标点）的数据，与matlab直线拟合结果做过比较，结果比较吻合和皮实-least squares fitting method for the implementation of small programs, as long as the importation of a series (more than two coordinate points), and Matlab linear fitting results done ear