基于三次埃尔米特多项式推导出来的三次样条插值matlab程序，用于知道一阶导数边界条件的插值，不仅可以输出插值节点的值，还可以输出每一段的插值多项式，更重要的是还可以输出各插值点的一阶导数值。-This is a matlab code of cubic spline interpolation, which is derived the Hermite of three polynomials. It can be used only when the first derivative of