参照统计学习（李航著）一书实现的MATLAB仿真代码，代码包含main主函数和kd搜索算法以及相应的数据输入，整个代码实现完整，可以直接运行。(Reference statistics learning (Li Hang) a book to achieve the MATLAB simulation code, the code contains the main main function and KD search algorithm, and the corresponding data input, the entire code integrity, you can run directly.)