最小二乘回归分析算法，课程设计时编写的matlab程序代码，微分方程组数值解方法，基于负熵最大的独立分量分析，复化三点Gauss-lengend公式求pi。- Least-squares regression analysis algorithm, Course designed to prepare the matlab program code, Numerical solution of differential equations method, Based on negative entropy largest independent component analysis, Complex of three-point Gauss-lengend the Formula pi.