若干数据线性拟合方法分析

DISCUSSION ON SOME METHODS OF STRAIGHT LINE FITTING

对等分三组平均法、分段最佳斜率平均法和线性最小二乘法这三种线性拟合方法所具有的共性和个性进行了探讨。通过一计算实例，分析了这三种方法所具有的拟合精度。研究表明，线性最小二乘法的精度高于其它两种方法，因此。在工程数据线性拟合时，宜选用线性最小二乘法。

The general and specific characteristics of three methods for straight line fitting,including three-group average, segment optimum slope average and linear least square method, were discussed.The fitting accuracies of three methods were compared. A practical sample showed that the accuracy of linear least square method is higher than other methods.The linear least square method should be selected to fit engineering data to a straight line.