使学生通过本实验，从几何直观观察几种插值方法的特点和不同插值效果，进一步理解方法的应用背景和适用范围。从而加强和巩固学生的理论知识，提高分析问题，解决问题的能力，提高理论知识的应用能力及计算机编程能力。-Students through the experiment, visual observations from the geometric characteristics of several interpolation methods and different interpolation effects, and further understand the methods of application of the background and scope of application. In order to strengthen and consolidate the students the theoretical knowledge and enhance their analysis of issues, problem-solving abilities, improve the application of theoretical knowledge, ability and capacity of computer programming.