另尝试编写的一个代码如下，实现对3类数据特征空间的聚类，如下图，红、绿、蓝三种颜色分别表示3类数据，经过rbf核映射到新的空间后，分别聚成了3类-This technique takes advantage of the kernel trick that can be used in PCA. This is a tutorial only and is slow for large data sets. In line 30 the kernel can be changed. Any Ke