龙格库塔法ode是专门用于解微分方程的功能函数，他有ode23,ode45,ode23s等等，采用的是Runge-Kutta算法。ode45表示采用四阶，五阶runge-kutta单步算法,截断误差为(Δx)3。解决的是Nonstiff(非刚性)的常微分方程.是解决数值解问题的首选方法,若长时间没结果,应该就是刚性的,换用ode23来解.-Runge-Kutta method is designed for solving differential equations ode performance function, he has ode23, ode45, ode23s, etc., using the Runge-Kutta algorithm. ode45 expressed using fourth-order, fifth-order runge-kutta single-step algorithm, truncation error is (Δx). Solve is Nonstiff (non-rigid) of ordinary differential equations. Numerical solution to solve the problem is the preferred method, if time did not result should be that rigid, for use ode23 to solve.