中文说明：
最小二乘一次完成算法，压缩包里以给出数据，可以运行试试看。
English Description：
The least squares algorithm is completed at one time. The data is given in the compressed package. You can run it and try it
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中文说明：
最小二乘一次完成算法，压缩包里以给出数据，可以运行试试看。
English Description：
The least squares algorithm is completed at one time. The data is given in the compressed package. You can run it and try it