在3D坐标系下展示一些离散流形及流形上的1NN和kNN分类器-plot some discrete manifold in 3D Cartesian coordinate system；1NN and kNN classifiers on manifolds

该代码包实现了直推学习算法(transductive learning),该算法基于kNN的一个扩展。优点是不需要任何启发式诱导，可以防止不收敛或者局部收敛-We present a new method for transductive learning, which can be seen as a transductive version of the k nearest-neighbor classifier.