北航数值分析大作业三，功能为用Newdon法求解非线性方程组，Gauss法求解线性方程组，求矩阵的逆，二元二次插值，按最小二乘原则进行二元拟合并自动寻找最小阶数。-Northern analysis of large numerical operations three functions with Newdon method for solving nonlinear equations, Gauss method for solving linear equations, find the inverse matrix, binary quadratic interpolation, according to the principle of least squares to be combined for two yuan automatically find minimum order of.