3次艾尔米特插值，数值分析课程例题。插值函数不但在节点上与原函数值相等，而且还在节点上相切，对应的导数值也相等，甚至要求高阶导数也相等。-3 Al Mitt interpolation, numerical analysis course examples. Interpolation function not only in the nodes of the original function values ​ ​ are equal, but also tangential to the node, the corresponding derivative values ​ ​ are equal or even higher order derivatives are equal requirements.