基于SVM的回归分析，以及其R语言中的四个安装包-Currently four R packages contain SVM related software. The purpose of this paper is to present and compare these implementations.

实现CART树回归，树的生成与剪枝过程，并与简单线性回归进行对比-Implement a regression tree generation algorithm when the leaf nodes indicate 3rd order polynomials. Test your program with the dataset and compare the results with those of simple linear regression