中文说明：keca算法源码，一种非线性的降维和数据转换方法，该方法降维之后通常能够导致数据集有一个明显不同的角度结构，有利于后续的聚类分析和模式识别等
English Description：
Keca algorithm source code, a non-linear dimensionality reduction and data conversion method, and dimension reduction can often result in data set after the method has a significantly different angle structure, conducive to subsequent cluster analysis and pattern recognition