数值计算 中的各种算法: Lagrame插值,Newton迭代法,Runge-kutta,二分法求根,解线性方程组的Guass列主元消去法,自动选择步长Simpson法-Numerical calculation of the various algorithms: Lagrame interpolation, Newton iteration, Runge-kutta, dichotomy roots, solving linear equations out Guass PCA elim