Isometric投影的方法，代码注释有参数接口说明和使用方法，供大家学习交流！-Isometric projection method, code notes that there are parameters and use interface for all to learn!

本代码实现等距映射isomap算法，保持高维空间测地距离不变-This code implements the isometric mapping isomap algorithm, to maintain a high dimensional space, the same geodesic distance