都是matlab中经典的函数与方程代码，如埃特金插值，复合求积公式，用欧拉法求一阶常微分方程的数值解，龙格库塔法等-All matlab functions and equations of classical code, such as Aitken interpolation, composite quadrature formula, the first-order Euler method for the numerical solution of ordinary differential equations, Runge-Kutta method