本文档用Python实现了龙格库塔法和牛顿迭代法，是数值分析学习的有用资料！-This document is implemented in Python a Runge-Kutta method and Newton iteration method, numerical analysis is useful information to learn!

牛顿迭代法，下载就可以直接使用，调试好的(Newton iteration method, download can be used directly, debugging good)