根据所给定的节点值和节点上的函数值,取边界条件为 “左右两端的一阶导数值为零”, 编制构造三次样条函数的 Matlab 程序。 另附测试程序-Depending on the value of a given node and the node function value, taking the boundary conditions for the " right and left ends of the first derivative value of zero,"