在许多问题中，通常根据实验、观测或经验得到的函数表或离散点上的信息，去研究分析函数的有关特性。其中插值法是一种最基本的方法，以下给出最基本的插值问题——三次样条插值的基本提法 -In many problems, usually according to the experiment, observation or experience the function table or discrete points on the relevant information, to analyze the characteristics of function. The interpolation method is a basic method of interpolation, spline interpolation, three basic formulation is the most basic problem is given below